ATT Has no Loyalty

I have been a ATT Customer for over 20 years. And pay over $1000 per month in TV, internet, and Wireless. Recently, they have been over charging my bill for the internet for several months. So I called, and they said nothing they can do? I was to pay $70 a month, when I Started, but been charged $80 per month for at least 6 months. So they cannot even rectify $10 over charge? Then my DirecTV bill went up $100 more per month. They offered a $40 credit to keep me. Haha. $40 on a middle plan I am on. I was getting charged almost $300 for the middle plan, and the top Premier Plan is going for $130??? So with the Internet and TV, it was almost $400. I only asked to come closer to $200. I was not expecting to match New Customer Price, but at least a customer that has spent over $250K with ATT. So I decided to end my account. And then will later submit a paper online, to share my experience. I think, they could have done a lot better!!!