T-Mobile is scamming?

Encendido 10 de OCTUBRE de 2021, I went to the T-Mobile store located at 9024 Jamaica Ave, Queens, NY 11421. I was offered a canje-en mi IPHONE 11 for an IPHONE 13 PRO MAX and get a credit for every trade-in I make since I am trading it in. The gentleman who helped me was named Joseph. But apparently when he was doing it that same day the system went down or something. It is not my fault that the system went down or something wrong went down. If it went down it is TU COMPANIES fault. I should not be held accountable for your company's errors and actions. I traded-in 2 IPHONES 11. So both CREDITS STILL HAVE NEVER APPLIED. It has been about over a year and STILL NOTHING HAS BEEN DONE. I am frustrated with your company handling things because they are not even trained enough to answer my questions at all. I call every week and literally nothing has been done still which is unbelievable, annoying and very frustrating. They always say “we are investigating and I will put a note here” and still I HAVE NOT RECEIVED MY CREDITS FOR BOTH MY IPHONES 11. I have all of the papers that I have gotten from T-Mobile. I have the tracking number and everything. AHORA APPEARTLY T-MOBILE CANNOT LOCATE MY 2 IPHONES WHAT A COINCIDENCE DON’T YOU THINK? IPHONES HAVE SERIAL NUMBERS HOW IS THAT EVEN POSSIBLE. That is not my fault that is your company’s fault ONCE AGAIN not doing their job correctly and not being trained enough! I have even been to the store several times and it is literally back and forth with all of the company’s employees. They always say ”we can’t help you, call customer service”. I call customer service and they say "go to the store they will help you". Clearly nothing is being done by your company's employees. I would not like to call and talk to Telemundo 47 and Univision, I am sure they would like the whole scoop of how every T-Mobile employees avoid to helping THEIR PAYING CUSTOMERS. I also know that every time I call everything is recorded. I know you guys have the recordings of me speaking clearly to your company's representative and telling me "yes, send your 2 IPHONES 11 and we will apply your credits soon as possible in your billing cycle". I also asked why it says 2 IPHONE 13 PRO MAX with the serial numbers INSTEAD OF MY 2 IPHONES 11, they said “it fine since I will put a note here and the line is being recorded for training purposes”. First of all if I am agreeing to a trade-in why would I return my BRAND NEW 2 IPHONES 13 PRO MAX. Think about it. You guys have my recordings clearly stating that it is fine that is says that and the employee put a note. I have the serial numbers from both my iPhones 11. You could never be too careful clearly. I called and I was told it's lost shouldn't everything get scanned since it's a huge company in the warehouse. The phones we sent together and T-Mobile provided me with the tracking number. I literally wrapped them carefully and mailed them out asap. I followed all of he instructions. What a coincidence don't you think? It been about ONE YEAR and still NOTHING AND I HAVE NOT RECEIVED MY CREDITS.  I will send copies of what I have received along with this letter. T-Mobile is very unreliable. Hopefully this LETTER DOESN’T GET “LOST” AS WELL.