Telkom, the ripp off

I've cancelled my telkom adsl line and landline on 10/02/2020, for 5 months I was billed after receiving confirmation that it was canceled. I queried this and on the 29/07/2020 got a welcome to DSL service email. I queried again as I did not apply for any service. I've queried online and instore. Every time I got a case number and shortly after, a case resolved message. Yet the debit orders kept going off. End of August I went to the bank to put a stoporder on the debit order and to reverse the money. Next month, the debit order went off again and again in October. My bank then told me that telkom changed the reference number on the debit order. I do have a cellphone from telkom as well, which is due for an upgrade, but now telkom has put a block on that as they say that I owe them money. They have now given me over to debt collection. I am at my wits end, as in a matter of fact, telkom owes me money. I have spent so much time on going to telkom, emails and online. This is absolutely the worst service I have ever received, in fact there is no service