Vodacom is *****

I have been getting calls from Vodacom but non of them are resolving my issue instead they keep on debiting my account for service that is not there. After I spoke to one of their managers who promised to resolve this, guess what they tried to debit my account again for the service that is not rendered after this manager confirmed that my fibre in no longer in use. What do I need to do in order for these people to stop harassing me. They owe me more than R2000 that they debited in January 2024 for nothing because their service is not there and I no longer have a contract with them. Can I take this matter to claims court? Now I have a duty of stopping debit order monthly and the bank is charging me. Vodacom this is not fair, you are robbing customers, this is *****.