Terrible Cartrack experience

I have the worst experience with this company firstly they had installed a faulty tracker into my car I was notified via SMS I called them to have it fixed and they promised me to call me back I waited 2 weeks for that call back that never happened I called again and they promise to get back to me within the next week which did not happen eventually I had forgotten about it but they kept debiting me every month for a faulty tracker for the next 5 months despite all the emails I had sent. I phoned them again in May and then again in August for the same problem did they eventually came out to fix my tractor in August however I express to them that they need to refund me for the 5 months that they debited me for a faulty tracker they failed to address my problem they owe me R500 because they debit me R100 every month for this tracker they failed to reimburse me that 500 for every month the tracker was not working I stopped the debit orders from my account and they still have the nerve to email me and tell me that my account is overdue. Even though they promised to get back to me with regards to my reimbur*****t which they never did they are very quick to email you if you don't pay them and this is the point that I find very hypocritical. Still to this date I am still waiting for a call back and they ignore me completely this is the worst company and in my opinion this is *****!