******** debit on my bank account after expiry of my contract with vodacom

I took a cellphone contract from vodacom in the 2019 and it came to an end in september 2021.when my contract was left with two month i called vodacom cancellation department to notify them about my cancellation.i was told that i must call in after my contract have expired which i did.when i call in after the expiry of my contract were i was told that i should have called in before the end of my contract.i explained everything but vodacom continue to debit my account ********l even after my several attempt with thier agent but no assistance. I want all my money which have been debited after my contract came to an end. Vodacom agents on cancellation of contracts are dishonst as they keep on telling me that mu issues will be resolved.even today i receive statement indicating that im owing them. I will never have businness with vodacom