Being lied to

On September 29th I had a conversation with the retention department. I spent over an hour on the phone about the large increase. I was supposed to be in a 24 month contract that only lasted 12 months. Finally things where figured out as the rep spoke with her manager   I was promised that I would receive a $60 a month credit that would go into effect on the next bill. The next bill came and only received a $5 dollar credit. I was also charged for the Sunday ticket that was never ordered. So was supposed to get credit for $80 charged for that. I called back and spoke with retention on Sunday and was informed that they aren’t going to honor what I was promised. I have been a customer for over $30 years also with cellular service since 1997. This is not how you treat customers that pay their bill on time and that honor their contract. If I failed to honor my contract you would sue me for breach of said contract. When AT&T representatives make an offer on behalf of AT&T it should be honored. It unethical and inappropriate to not honor that agreement. This needs to be fixed or I will be ending my relationship with AT&T and they will lose my $4000 a year. You aren’t the only ones out there. I own my own heating and air company and I wouldn’t be in business long if that’s how I did things.