Unlock Iphone

How long it takes to unlock an iPhone 14 Pro Max that has been paid off and has been in use for more than 40 days? I have been calling T-Mobile to get my phone unlocked for the last two weeks. I met all requirements to unlock my phone! Customer service only gives excuses for why my phone hasn't been unlocked. All the time the representatives are telling me that the case was escalated to their supervisor and that they will get back with me for the status. When I ask to speak with a supervisor, they put me in hold for more than 30 minutes (to gain time) and them come back with another excuse that the supervisor is with another costumer and will return my call. They never call!!!! What should I do at this point????