Customer service is non existing

From day one after I signed the contract I have had nothing but poor service, you email people and just never get a response. First it took them 2 weeks to install the unit, secondly the unit stopped working with in 3 hours of it being installed and every so often my unit will freeze for 24 hours or so, making tracking basically useless. I couldn't get a hold of them via the usual avenues, which worked well to get me signed up but there after those avenues disappeared, Hello Peter then became the only form of communication they respond to, bit frustrating but whatever gets the job done, I have been counting down the months until I could cancel, now I am having the same issue cancelling my contract, I get sent "request for cancellation" form but once you complete them and send them back, no response, I have requested confirmation that everything has been received and in order, guess what NO RESPONSE, sent multiple follow up emails, NO RESPONSE, so I have come to old faithful " Hello Peter", sure this is going to get me a response as it seems to be the only working line of communication.