Unclear Sales process, no service

Called Cartrack to connect a tracker and install a dashcam in my car. Sales process was confusing to say the least. Instead of presenting the possible products and options, I had a very long call with the Cartrack Sales lady struggling to understand. In the end she manually read the contract to me and I had to verbally agree to loads of stuff. Weird. Some days later, the installation guy arrived and he connected the tracker and installed the dashcam, however he said that Sales made an error by registering 2 cars on my account. Why?? We tried to call CarTrack support to rectify this but by then it was 16:30 and the support lady in JoBurg said that she wanted to go home. Anyway, I'm not sure whether the tracker really works and I could not find any dashcam footage of my trips online when checking my account. This was a lousy job by CarTrack. I have emailed them about all this, but so far no reply. So I cancelled my debit order and unless they can prove to me everything works ok, they can undo the installation for all I care.