Cartrack Harrassment and Poor Service

Cartrack failed to recover my vehicle when it was ****** on 21 May 2023. Despite me advising them to cancel the contract and stop the debit order on the 23rd May 2023, they still debited me on 1 June AND 1 July 2023. I requested my bank to reverse the debit order for July and stop future payments. Now Cartrack are sending me letters of non-payment threatening adverse credit listing and legal action!!! I have again instructed them to desist from issuing these notices and to stop harrassing me but they have not yet done so. VERY POOR SERVICE from this company - not to mention that they also declined to honour the R150k warranty they promised if they do not recover the vehicle. This based on a technicality (I didn't do a 6-monthly check to see the unit was working but I have evidence that the unit was in fact working on the day the vehicle was ******).