Disputing Vodacom's Claim

I had a contract with Vodacom and decided to close the account in August 2023. I requested a cancellation quote, paid the amount, and sent all the required documents to Vodacom. Last month, I received messages from their lawyers claiming that I owe Vodacom money. I asked for a full statement to check, and to my surprise, the statement only showed 7 months of charges for 2024. The other months of 2024 and the remaining 4 months of 2023 were missing from the statement. It is very difficult to get help from Vodacom’s customer service, cancellation team, or legal department. They just transfer my call from one department to another, with some departments saying my account is not even on the system. It’s a constant back-and-forth, and meanwhile their lawyers are insisting I pay the amount without giving me a clear explanation.