false promises

After one year of being a customer with T-Mobile, I had no issues. I always got great customer service. I had decent coverage for my area, no complaints really. I added two lines and brought both my parents over from Verizon because I was so satisfied with my service and it was much cheaper for my parents who are elderly, T-Mobile told me they would reimburse me for the final bill for last month of service with Verizon as well as Reimburse me for any amount owed on the phone as long as the combined total was $800 or less. I understood this. I thought this was great so I did as stated. They did in fact, reimburse me $527 for paying off one of my parents phones, the second phone was already paid off but when it came time to pay the $214 last month of service to Verizon, T-Mobile all of a sudden didn't have a clue what I was talking about. Even though they record all their phone calls, they would not look or listen to verify. This is what I was told. Customer service simply put me on hold forever and ever come back and repeat the same information That I was only getting $527. I was not allowed to speak to a supervisor I was not allowed to speak with anyone else. I was simply told I would be able to do it, but my hands are tied. I'm bout to bounce. I hate being lied to and I was curious if anyone else experienced the same situation or something similar. Gracias.