Vodacom *****ing money every month

2 years ago I upgraded my contract at Vodacom, receiving a 'package deal' where an extra phone and line were included for free. I recently upgraded my contract again, during which time nobody at Vodacom EVER told me that the extra line will now become a separate charge on my account if I don't cancel it. I only realized this after receiving my first new statement where the old free line now suddenly became a charge on my invoice. I called Vodacom immediately after receiving this invoice on 12Oct2020 @ 17h22 to cancel this line. I was told that it was cancelled and that my next invoice would be correct. Fast forward to 13Nov2020 and the new invoice has the same old line charged. I called Vodacom AGAIN on 13Nov2020 @ 09h12 and was told that the line had really now been cancelled and even told that the prior cancellation had been escalated now since it was not done correctly. I was told I'd receive an SMS. Today is 26Nov2020 and I am yet to receive that SMS. I called Vodacom YET AGAIN!! on 26Nov2020 @ 17h13 to confirm that my line has been cancelled. Big surprise - it has NOT been cancelled. Now I'm being told it cannot be cancelled since I broke some sort of rule according to them and I have to keep the contract until 2021 or pay a fine. When I asked what exactly this 'rule' was and when this rule was communicated to me (which I am 100% certain it has never been communicated to me) - suddenly the line dropped. Called back to get the information and was told that the individual that was helping me was 'busy' and would call me back.

If you keep taking my money I will stop this debit order at the bank until Vodacom fixes their mess. I think I'll start reviewing MTN's available contracts.