Unprofessional Service

I'm really not a happy with Telkom. Telkom called me around Feb stating that my contract has ended and I'm due for a an upgrade. I told them to cancel my contract as I got a better service provider. The agent stated that my contract has been successfully cancelled only to find out that the agent hasn't cancelled the contract and they are still debiting my account. I reversed the funds and they debited the funds again I asked why is Telkom still debiting as the contract has been cancelled the consultant explained that my contract is still active. I got an email that I'll be debited R702.40 for what exactly because I don't use Telkom anymore. I spoke to Mbali Ndlovu *** she stated that they'll debit because my account is still active but that's my problem has I've requested several times for my contract to be cancelled. Mbali even said she can see that I've called but she doesn't know why my contract is still active. Please sort this out