Early cancellation fee

I recently moved out of state ,and brought my Dush Netwok equipment with me as I was told to do by their customer service. After we purchased our new home ,I called to have it reinstalled. I was told there would be an installation fee to do this. I refused to pay it and cancelled the service. I received a bill for $30+ as my final bill. Soon after I received a second bill which stated I had a zero balance. Now I get a bill for $277.00 for early cancellation and sales tax?? Do I have any legal recourse, or am I stuck with this?? By the way, they also had been charging me a service fee to come to my home to repair THEIR equipment when I lived in FL. What a bunch of thieves!!