Vodacom takes my cancelation fee money but don't cancel my contract and still deduct money from my account!

I called vodacom care line on the 4th November 2019 to get my contract canceled the agent I spoke to said she'll forward me my invoice and I can make the payment at any vodacom store and email the cancelation form with a copy of my ID cellphone number and vodacom account number to the email address provided on the invoice which I did with proof of payment. The agent informed me after they received email my contract will be canceled and I can use my vodacom number as prepaid. I feel so disappointed in vodacom because they took my money and didn't cancel my contract and still deducted money from my account end November 2019. I send them an email regarding my query still no response!