Worst service, rude personnel , dysfunctional device

I have been with ctrack for over 8 years and this year i am having a bad experience from hell. The people working there are unprofessional and have no empathy or whatsoever. My device stopped working in June, they didnt even bother to pick this up, upon finding that it is not working , i have been contacting them since and they just promise to come and check it but never pitched. Its been 3 months now , yet they are debiting, i blocked their debit and told them i will not be paying for a dysfunctional device yet they still sent me statements. Really can you just stop *****ing clients and do your job. I want you to come remove your device , your stuff are rude, others make appointments but never pitch not even an apology. Disappointed.