Cancellation request ignored

I'm greatly disappointed and disgusted by the service I've received with Mtn for the past 3 months regarding a simple cancellation request,I took a contract in October shesha 200 online,only to find out it isn't supported on my router and I was informed I cnt upgrade.

I called for early cancellation was given an amount of R366.52 which I paid at Gateway mtn store on the 28th Oct were I was informed I didn't owe anything but I processed to make payment.

I then called in on the 28th Oct were another agent from retention informed I didn't owe and wasn't supposed to pay also that an upgrade was possible,I informed can I have a cancellation done plus complain for my refund then she transferred me to customer service who said there can't see anything and not sure if refund ,so I just said it's fine just confirm cancellation has been processed agent said yes .

In Nov I got a billing I called in was told system takes about 30 to show cancellations.

In December I then got debited only to be informed it was never cancelled and the money I paid for cancelling was used for debit for November without me knowing.

Called again 22 December to follow up on cancellation was informed and investigation will be done of call recording and will receive a call end of that day for feedback which never happened.

I then called in today 30 December to follow up and no investigation was requested ever and was informed I can't cancel till it has been done which means il continue to pay for a subscription I'm not even using as if any agent cancels Thier will be liable for the cost.I spoke to Snenhlanhla Ndlovu and manager Siyanda Ntshangase, who said also there can't cancel as it's a agent Shellon Peterson who needs to cancel and take the cost how as a client I'm involved in who is liable for cost is beyond me as I understand an cancellation should be then the company should check who is liable at their own time and cost not mine.

Was transferred again told I'm sent to that agent who was supposed to cancel,which I wasn't person I got send I need to pay other R500 odd rands for a new cancellation.

I need this stupid contract to be cancelled and my money to be refunded for this month's debit which shouldn't have gone through.