Phone upgrade issue

T-Mobile is the most bullshittest phone company I've every experinced!! I was woth sprint for 12 years and financed 5 phones and now that thece merged with sprint I'm not eligible for an upgrade because of the system won't allow it. I've had 7 teams memevwr tell me different stores promising to write a ticket and have it sent up, and a promise to call back woth no one calling. The level of u professionalism is ridiculous and the lies their team members tell over the phone is extremely horrible I wouldn't recommend them to ANYONE. They forced me to stay with them after but an employ lies stating if I paid my bil I was eligible to get my upgrade and after she got my money then she tells me I'm not eligible it's a problem woth the system. I never had a problem with Sprint but things the worst company they wanted me to pay 1300 down for an upgrade