I had the worst ATT day yesterday, I was lied to and they won't fix it. Supervisor please call me

It started towards the end of July. I received a phone call from an ATT rep and at some point throughout the conversation she mentioned I qualified for a free Samsung tablet. I declined and she said she can upgrade the tablet to an Ipad for $50. She stated all I had to do was pay $50 and sign a 2 year contract. Up to this point I was pretty satisfied with ATT so I decided to accept the offer. A week or two went by and I received another phone call. The rep said there was an issue with the auto draft of $50 so she asked if we still wanted the deal. We agreed and she re entered our account number and drafted the money. She also stated we need to check our email for a confirmation email and accepting the 2 year contract. I checked my email and accepted the deal. Another couple weeks went by and I get called to help with Hurricane Harvey as I'm in the Texas Army National Guard. I get released around the 6th of Sept and receive an email telling me to check my bill. When I log in and notice a big spike in payment, I do a detailed look into why it went up. Come to find out the rep did something wrong or ATT did something wrong and instead of giving me a $50 tablet with a 2 year contract they did an installment plan for $530.

I immediately called the customer support number last night. I speak to someone, didn't get his name but after telling him what happened he transferred me to a nobody. The person he transferred me to answered the phone and when I began talking about the issue he hung up on me. Feeling annoyed I called back and ask to speak to a supervisor. I waited for 38 minutes on hold before someone answered and this is when things got worse. The supervisor reviewed my account and told me "the representative in question will be coached and we are sorry for misleading you. Unfortunately you signed the agreement and are outside the 14 day window so there's nothing that can be done." She admitted multiple times that I was mislead by ATT representative. But after every comment she repeated that I signed the contract, which at the time I was told it was the 2 year agreement deal not the pay for the tablet in payments.

After another 20 minutes arguing with her she must have got fed up because she told me she would transfer me to the loyalty department and a supervisor. When she transferred me a lady picked up and I asked her if she was a supervisor, she said yes she was part of the management team. As soon as I started telling her my issue she disconnected me.

Where has ATT customer service gone. I would like to speak to a real supervisor above the people that I spoke with. Please contact me.