VODACOM REFUSAL TO CANCEL

I have been trying to cancel 2 vodacom internet contracts since July 2020. All my numerous calls were conveniently dropped or ended once I told the operator that I wished to cancel. I then posted my experience on this platform. Vodacom responded and undertook to cancel the contracts. I believed them. However, my account is being debited with the cost of those 2 contracts since July 2020 to date and as usual all attempts to cancel by phone, which is the only means of cancellation which vodacom will accept despite the contract requiring cancellation in writing, are not enabled, because they cut the call soon after saying that you want to cancel. PLEASE SOMEBODY HELP TO OVERCOME THESE VODA******.