Need assistance: Unable to Remove GoDaddy as Partner/Reseller and Unfederate the Domain actus.law

I have been trying to resolve this issue for nearly four weeks, and been through many troubleshooting sessions and telephone calls with Microsoft Support, but this seems extremely complicated:

1. The domain actus.law is owned by the Danish law firm Actus Law, and is registered with GoDaddy as the domain registrar.
2. The Microsoft 365 tenant was originally created and federated by GoDaddy, who acted as the delegated administrator (via DAP/GDAP).
3. On advice from a Microsoft Sales Advisor, Actus Law purchased a Microsoft 365 Business Standard license directly through Microsoft connected to the above tenant with the goal of managing the tenant independently through the Microsoft 365 Admin Center — without GoDaddy's involvement, beyond being the registrar.
4. After the purchase it was impossible to manage users/licenses/domains in the Microsoft 365 Admin Center, as the domain is federated and therefore all requests always get redirected to GoDaddy. It was therefore not possible to verify the domain or create any users.
5. I contacted Microsoft Support on 8 May, where I was told that the way forward was to delete current DNS records and remove GoDaddy's partnership privileges in the Microsoft 365 Admin Center. We therefore deleted all GoDaddy's delegated administrative privileges (GDAP/DAP) on 8 May 2025 and requested GoDaddy to end the reseller relationship. After this the support agent closed the ticket. This was handled through Support Ticket #‎2505081420003154. GoDaddy afterwards confirmed that they have removed all rights and that the domain is free to be unfederated. However, this did not solve the problem, since GoDaddy is still registered as partner and the domain is still federated. Therefore I am not allowed to make any changes and I always get redirected to GoDaddy when trying to manage anything in Microsoft 365 Admin Center.
6. On 9 May I contacted Microsoft Support again and asked to disconnect the tenant from GoDaddy so I can manage everything in Microsoft 365 Support Center. This was under the Support Ticket #‎2505091420000046. The assigned agent tried during multiple weeks to troubleshoot and fix the problem with PowerShell commands using both MsolService and Microsoft.Graph, but always ended up getting access errors or insufficient privileges to perform the change in authorization from federated to managed. It has also not been possible to delete GoDaddy as partner.
7. On 20 May I was asked to contact GoDaddy again to make sure that they had removed themselves as partner, and I got the following confirmation in writing from GoDaddy's Advanced Technical Support:
8. "The Microsoft 365 organization for actus.law is no longer associated with GoDaddy. You can now reach out to Microsoft directly and receive support for a password reset for any admin user you need to access, or any other support issues. NOTE: If the domain is still set to use GoDaddy’s email login system you will need to ask Microsoft to “un-federate” the domain."
9. On 21 May I explained GoDaddy's response in an email to the assigned agent, but now the agent simply stopped responding to my emails. I sent a reminder after 5 days, but did not get any response. On 28 May I called Microsoft Support and was assigned a new agent. That agent told me to contact GoDaddy, as it seems they still have visible GDAP, and only GoDaddy can remove that. Then the agent closed the ticket.
10. I tried to contact GoDaddy afterwards, but they told me that the reseller relationship/GDAP was completely removed from GoDaddy's side on 8 May 2025 and all changes have propagated. However, since all GDAP/DAP had already been deleted at that point (which was done on 8 May, see above under number 4), GoDaddy could not remove it in Microsoft's systems according to the normal procedure so it is correctly reflected in the Microsoft 365 tenant. So they asked me to contact Microsoft Support again and explain the situation.

WHAT I WANT TO ACHIEVE: I want GoDaddy completely removed as partner/administrator from my tenant and the domain actus.law to be "managed" and not "federated", so I can manage everything directly in the Microsoft 365 Admin Center and use my Microsoft 365 Business license.

CURRENT STATUS: GoDaddy says everything has been removed on their end and that only Microsoft can now unfederate the domain. Microsoft Support says GoDaddy still needs to remove DAP/GDAP — but I cannot see their DAP/GDAPS anywhere in the Admin Center, and GoDaddy says they’ve already done it.

Does anyone have an idea of what to do in this situation?

I would appreciate any help, I feel completely stuck, and I am unable to set up any users or mails 😒