Vodacom still debiting my account after contract was cancelled a year ago.

Good morning

I cancelled my Vodacom account more than a year ago. I paid my buy out fee and even received a reference number from Vodacom acknowledging that my contract was cancelled. Suddenly a year after this, they started debiting my account again. How ridiculous is this?

I phoned them and the promise the problem is resolved. But then this morning I woke up with an email from them for another invoice and statement. Sick of dealing with them. They debited close to R2000 from my account *******ly and I don't know if I will ever see my money again???

Can you help?