Debit order cancellation

I had an alarm with ADT when I moved from my home which was installed in September 2021. To this date, they are still debiting my account, I have tried all avenues to get this canceled with no luck, so emailed, and called. My account was debited again this month. As a single parent, I do not have thousands of rands to through away, which I have done due to this debit order still going off. I am asking anyone who can help me resolve this issue and help me get a refund back from them. I really don't know what more to do in this matter.