Dish Network Ignores Me

I have written (e-mailed) Dish Network four times, three addressed to the President and one to customer service and have not received an e-mail response. My concern in contacting Dish was that as a 13 year customer, I should not have to sign a two year contract to have free HD. They are giving free HD to new customers but old customers be damned. I am also concerned that some of the Fox and FX channels have been removed without reducing my monthly charges. Even if they disagree with what I have to say, I still deserve a response.