T-Mobile

I visited this T Mobile and was helped by an employee who said his name was John, but it turns out it's actually Mohammed and he goes by Mike or Mo. I allowed Mohammed to access my account, but ultimately left without making a purchase.

A few weeks later, I went to another T Mobile location. The employee there told me I had no upgrade left and that Mohammed had extended my contract by two years, including entering a serial number for a phone I hadn't purchased. I returned to the original store to have the error corrected, and when I explained the situation, Mohammed immediately started yelling at me that he had made one click in error that had caused this situation. (I later confirmed with T Mobile that extending a customer's contract is a multi-step process and that there is no way this was a one click error.) He refused to call T Mobile to correct the error, instead insisting that he had sent an email. I asked for a copy of the email and he refused. I asked for any proof...