Cancellation of the telephone contract

I canceled my contract with Vodacom in August but Vodacom continued loading airtime and debiting my account made a follow in September but they are still debiting my account. Please assist me in canceling this account. See the attached email from Vodacom Good day , kindly assist customer called in August to cancel and was promised a cancellation but it was not loaded as promised and in September she called again but cancellation loaded for end of October she even reversed the amount debited and she is not willing to pay because she called to cancel ***.

Cancellation was suppose to be loaded for end of September. Please assist with clearing the arrears.

Service Request :reference number ***

Thank You