**** about contract to make sale

I have been a mr price customer for many years. They called to say they would be sending me a mrpmobile som card for which I had to pay a once off fee of R100 and that would work as a pay as you go card. I asked twice on this call if it’s soemthing I could just discard if I didn’t want to make use of it and the sales assistant said yes a few times over. The sim was delivered and after signing for it I then read the fine print which said I had just signed up for a monthly contract wifh mrpmobile. I immediately called customer care making use of my cool off period to cancel this contract that I did not agree to. The consultant simply said cool I’ve cancelled your contract and you won’t be billed for it. I asked for confirmation of the cancellation and she said it would take 48 hours to cancel it but that I can be assured that it will be cancelled. I just received my Mrp bill and R200 has been billed on my account for mrp mobile. I want this fixed right now!! What ********s have you got working for you? Both consultants blatantly **** and ignored my requests!