Vodacom contract early cancellation nightmare: I***-5

I've been a vodacom customer for over 20 years both prepaid and contract and after nightmare experience I had with Vodacon when I cancelled my vodacom cellphone contract early now considering cutting my ties with vodacom and port my numbers to MTN, Vodacom doesn't care about their customer

I called Vodacom beginning of April 2025 and requested a quote for early cancellation, vodacom quoted me around R4.6k to cancel my contract, I paid the amount on the 15th of April 2025 and then email vodacom a signed quote and proof of payment on "***" and I called vodacom and the retention agent told me that my contract will be cancelled end of April 2025

To my suprise, a month later, end of May 2025 vodacom debited my bank account an amount of around R2k, I called vodacom (reference number: ***) and the customer care agent I talked to, told me that the debit order was a mistake and the amount debited will be returned to my account, I then reversed the debit order, only to find out this week, 3rd week of June 2025 that vodacom have referred my account to their legal department for the R2k, mind you I didn't even receive an invoice from vodacom, not even a call from vodacom, I am not even sure how Vodacom came up with R2k they tried to debit me as my monthly subscription was around R600 before I cancelled my contract.