Anyone else experienced a PAID line being added to their account without your authorization, and then had issues with T-Mobile when trying to remove the added line and get a refund?

went into a tmobile store, the guy removed a app off my phone i didnt even know i had. found out that there is another phone with my phone number connected to my account. paid my bill each and every month, they took my credit and added to a manufactory warranty phone they all ready recieved. then adjust the manufactory warranty phone and never gave the credit back. phone was cut off August 30 due to them not removing the manufactory warranty phone. talked to a supervisor and she finally removed that phone told me my bill wasnt due to Sept. phone gets cut back on then they turn it off again. how you adjust the manufactory warranty phone and take the credit and add it to that phone that was returned. and never take my credit and add it to my bill. Superviors hanging up on me. had me down that i started my account in Feb. when i started in March. found a redircting phone call app on the phone. five after service Mcafee got multiple hits on the phone number.