Worst service

I've had my new car for 3 months already and I've been waiting ever since for my new tracker to be installed. Every time I book, no one bothers coming out or making contact with me. I've asked for my subscription to be cancelled and I refuse to pay a cent more for services or for cancellation as I've received pathetic service.

I had to change my insurance to remove the tracker and evidently, my premium increased.

I've requested on more than one occasion for this service to be cancelled due to the fact that no one bothered coming out to replace my tracker and now I am still being charged, for what?!

I need this sorted asap else I will take this further! I am not paying anything more for a service I'm not getting!!