Very poor service and refusal to sort this out.

ish I could give a minus 5-star rating. I have been harassed by debt collectors for being handed over by this company for an alarm contract I cancelled SEVEN months ago. Account JOO00578. I have never had a call from ADT, nor an invoice, or statement of account sent to me for the outstanding amount of R158.04, for which I have no idea what it is for. I have no fewer than 7 email exchanges between myself and ADT wherein I struggled to get them to acknowledge cancellation. I also have proof that I cancelled by giving way more than 30 days notice. I refuse to pay for a service I not only did not receive, but which was cancelled months ago. I also refuse to pay collection fees for a collector, when whatever default ADT thinks has occurred, is as a result of their own poor administration skills. I will approach whatever Ombudsman I need to, or will engage my own legal counsel if this matter is not withdrawn immediately, as my credit rating, which I am very particular about maintaining, is being ruined by incompetence.