T-mobile gave my personal account to someone else

My phone has been hacked for 9 months.  This person, whom I do know, got in by knowing my email and has now made himself my account manager.  He can do ANYTHING

He want to my account.  He has also controls my internet and is stealing my free Netflix and Paramount.  I have been told so many different lies by T-mobile.  They have escalated upon escalated it to the " Backroom "  and nothing changes.  I've told them so many times he has made himself my account manager by knowing my email.  Yet they won't get him out of do not know how it just don't care.  Sometimes if I want to add something or download something it tells me I will have to get permission from my account manager.  There are so many setting grated out and I can't toggle them in or off.  He has even gone so far as to change my pin Passover to a pattern.  He has even stolen all my pictures off of Google one.  This is so unbelievable that T- mobile can't or won't fix this.  I am going back to Verizon because you get so many different answers when you call and they All promise to keep you safe.  Out of the " approximately " 4000/ 5000 reps I've talked to its a very disturbing fact that they promise and tell you it is their number 1 priority to keep you safe.  So, long overdue, Bye Bye junk T- mobile.  This is a true story and I have taken soooo many screenshots but they say they can't receive screenshot....crazy!!!!  When all of this first started I was sitting with a representative about 40 minutes when he's scrolling through my phone and suddenly says " Someone is trying to log into Craiglist in you phone ".  I asked him who was trying to log in and he told me Keystone flooring.  My gut was right....that's exactly whom I thought it was.  T-mobile doesn't listen and does not care.   Correct me if I'm wrong T-mobile by fixing my phone and taking all those BS charges off of my account.   I'm sure I'll wait another 9 months....lol.....pdoable that I will be with Verizon again this eve.