Incorrect billing

I had a contract with Vodacom that was due to end in October 2024. It unfortunately went into arrears that I negotiated with Vodacom to pay over 4 months, starting from October 2024. January 2025 should have been the last installment but my bank account was still debited the same amount in February. I've tried reaching out to Vodacom Billing section and even sent bank statements but my issue remains unresolved. The Vodacom App indicates that I have a debit order due to go off again in March. This is ******* absolutely unfair