Transfer Subscription from CSP to Pay As You Go

I have scoured the internet on how to transfer our Azure subscription from a CSP to pay as you go but I do not see any way to make this happen.

My CSP doesn't know how to transfer the account to us either so I am at a loss. We want to take ownership of our Azure portal and be able to open support tickets directly with MS. Can anyone help me on this process?

If this is not possible, how do I setup a new subscription for the same domain name and migrate all resources to the new subscription? I have not performed an Azure migration before so I am at a loss again here.

Thanks.