Direct TV A business model designed to screw the customer , Internet

I signed up for Direct TV on the Internet.  I never received a contact and asked the installer when he came to my house. He said it would be sent. I was busy traveling out of the country and just assumed the terms on the Internet ad would be what I would pay. After a couple of months my credit card number changed so I looked at the bill to get the 800 number to make the change. To my surprise I was being changed more than double what I thought. I called and was told that 90 days was up and I can no longer get the discount. They said someone would call within seven days to discuss the problem with me.  I thought seven days was a long time to leave an unhappy customer hanging and was not surprised that I never received a call. I called again and was given a total run around. I talked to three people and none knew the meaning of customer service. It is all on the customer. Direct TV takes no responsibility nor any action to satisfy a customer. Their business model is designed to make it difficult to apply for the rebates and they will do nothing to help. This weekend I am having cable installed and I am throwing the dish in the street. I have dared them to try to collect an early termination penalty. They are all bad but Direct TV is the worse.