Telkom is debit my account for a contract that expired long time ago

I had a data contract with telkom which expired in 2018 if not mistaken, I went to telkom in Westgate mall to cancel the contract the consultant I spoke to said the contract was cancelled automatically by the system and I can still use the Sim card as prepaid cause I won't be getting data from telkom, in 2020 I saw a debit order going off my account I went back to Westgate mall and they refer to the call center and the consultant I spoke to was Gift or Sipho he said I must reverse the payment and he is going to call me back for cancelation but I did not get any call from him , this year in February I received a call from their lwayers they told me to pay R1900 or I will be listed and I paid the full R1900 I told them I want to cancel this contract because I don't even have their Sim card anymore I'm paying for something that I'm not using , they debited my account twice again this year can someone please help I'm enough with telkom, my ID number *** , cell ***