VODACOM CANCELATION HUGE PROBLEM!!!

I would like to lay a complaint about Vodacom. I have been a customer of Vodacom for many years and am very unhappy with my current situation. Recently 16 December 2020 I cancelled my daughters contract with great difficulty. I was told by the consultant that I need to give the notice of cancellation at the end of the month. I waited until the end of December and then gave notice of cancellation again. I was informed by the consultant that the cancelation was processed and that no monies was outstanding on my account. This month February 2021 I have been notified by Vodacom of an outstanding amount on my account and to my huge disappointment the cancelation was canceled by Vodacom as they say there was an outstanding amount on my account and therefore the cancelation could not be processed. I was not informed at any stage of the above. I cannot afford to pay my arrears let alone two contracts , this was the reason for cancelation. My daughters contract was supposed to end according to contract on 31 December 2020 but has continued. Vodacom insists that I pay the arrears despite me canceling lawfully the contract and each time I contact the call center someone tells me something different. I am very upset and I expect this to be rectified as I will not be held liable to pay the arrears on a contract that was meant to be cancelled in December