Contract not cancelled

Good day,

I called in and cancelled my contract on the 01/12/2023, I even received an SMS, however it was not cancelled that month, i had to call again on the 02-01-2023 and process the cancellation again,

Please find the recorded call from the 01/12/2023 to prove i cancelled it,

Not am being charged a higher rate for 2 months, but i am charged for an entire extra month which is not for my lacking of contacting vodacom,