Vodacom refuse to cancel subscription

I have a Vodacom cell phone account that ended 30 September 2020. I tried to cancel the contract but because my account is currently in arears I am unable to do this. This situation is making it more difficult to bring this account up to date since Vodacom continue charging the monthly subscription. This is an ************ way of keeping clients locked into contracts that has come to an end. Please cancel the contract with immediate as legally it has come to an end or my next step will be to approach the Consumer Protector or ICASA on this matter. I am not refuting the outstanding the amounts but I need this contract to end with immediate effect. Vodacom also cancelled the option where you could lodge a complaint, leaving clients to deal with *********** call center agents that tell you your issue cannot be escalated.