Nudebt Harassing me for Telkom's errors

I had a 14 day trial LTE modem with Telkom, i processed a valid cancellation withing the 14 day period through the rep that delivered the modem, i then went on leave and had no access to my emails, for some reason telkom didn't cancel the contract as the rep requested, when i got back to work i fought telkom with this, i reversed all my debit orders, created stop orders because i shouldn't be billed, telkom is \investigating"from the 27th January already and my reference is : SM82930 in the meantime Nudebt is harassing me affecting my credit reputation"