Cartrack *****s

I have been with cartrack for more than a year. The tracker is on my sons bike. When he was in an accident, i continued to pay cartracker even though the bike was written off. Bought a new one and it took cartrack 2 months before new installationwas done. I skipped one month payment due to not receiving the service paid for but eventually paid all "oustanding" moneys. Now they are charging me R4000 for cancelation although i did not cancel and I have no access to the app. Also, when in use, cartrack was unable to provide accurate gps tracking and also no crash detection although i am on thr highest tier. Its so frustrating that no one can assist