Very bad service experienced

I'm very disappointed with the service from Cartrack. I've been using Cartrack since 2012 when I bought my car but I'm not happy the way they run their business. Sometime last year I missed 1 premium payment and without them talking to me they decided to debit the amount on the not authorized or agreed date and that led to unpaid debit order fees that I was liaible for. I did send numerous request and made phone calls in a hope for assistance. I even made an arrangement with them however there was also another unauthorized debit order before the arranged date and still causing me unnecessary unpaid fees. I was told to send banking statements for those fees to be reversed and that was in March but still nothing happened. Yesterday they debited on my account again without any communication with me and that resulted having another unpaid fee charged. They sending sms for the unpaid amount however they are not willing to rectify the issue at hand coz I have paid for those unpaid fees. My first request is dated March 16 but no one is willing to assist with my issue. I'm really fed up with their treatment. If they are willing to refund me all the unpaid fees then I'll be glad to cover that 1 payment that is outstanding which is R195