Didnt cancell contract

I opened a month to month 20 gig data contract with Louwtjie at Telkom Kollonade retail Park. Two days later I emailed him and confirmed there is no signal with the sim card so I need to cancell it. He confirmed per email he will cancell it now and it will talke two days to be completely off. I asked him what will the costs be because it was not even a week that I have the contract and there was no usage on it, and yet again he confirmed per email, there will be no costs. About two weeks after it I went back to the store after I got a bettet wifi router with better signal and open a new contract with him. I gave him the old one sim.card he said he cancelled and he broke it in store. I took the new one and got my new number. In the beginning of februarie I phoned telkom and asked why my data sim card is blocked and they confirmed that number was never cancelled and still have two contracts running from October and now owing over R1900. Nobody at Telkom comes back to me, Louwtjie doesnt respond to my emails and the lady at Kollomade retail park who worked on saturday is really rude with a really bad attitude and told me on 6th that she cant assist me and she cant help to resolve it.