Stay away from Adt fidelity security service - ****

Terrible experience, when I tried to cancel my deal with them because I sold the property they were guarding, they didn't want to help. They keep asking me if I know anyone that wants to sign up with them. They continued debiting my account, after long fight they stopped the debit order but they are still sending statements, they say I owe them R3500, they can't even explain what is it for. There is no contract with my signature on, I was told it was a month to month agreement. So I don't understand why they continue sending me invoices. I will be taking the matter with consumer bureau.. Fellow South Africans please stay away from Adt fidelity security