Trying to cancel, with so much struggle.

I've tried to cancel my beam-e device from January with no success. I was promised a settlement letter in January as I have to pay a settlement fee, I'm still waiting. I have sent requests on the website to be called, called in about a 100 times ,sat on the line waiting (wasting my Airtime ) for someone to answer, however as soon a someone answers they drop the call. Joining was easy but now that I have to cancel (because I have sold the my car in January) I cannot get hold of them. Thank goodness my car was never ****** that would have been a complete mess. And they keep on taking my debit orders knowing well that I have asked for a settlement letter, NO customer service to follow up and ask if it was received. How will it go if you had to call them to look for your car ?