Cancellation of contract

I phoned Vodacom in December 2019 to stop a contract **********, but it still deducted funds monthly, I then phoned in January 2020 to stop the debit order We are now in August 2020 and they didn't stopped the debit order. The sim card is also not working. The airtime: Who received it now??????. After the conversation the person at the call centre promises the problem will be solved. Nothing was done to my problem until today. This is bad service. If I go to Vodacom they say phone the ********** number. I want this problem resolved. They owe me +/- R1800.00 now. Bad bad services never ever refer people to them or any other contract..