MTN *********** CHAMPIONS

Hi For the past 3years I had a contract with MTN where I purchased a laptop, last in October when I was due to upgrade I I phone to cancel the contract and I phoned again in January 2023 to ask if the cancellation was processed and I asked if the account was going to be closed and no debit order would go through to my account and the MTN champion confirm that everything is fine and nothing will go to my account, surprisingly in March my account was debited and I didn't budget for that as I was under the impression that the contract ended in February and I even reversed that debit as it was blocking important things of mine, suddenly today I enquire and the champion today tells me that I was supposed to ask them to move the account to prepaid and because I didn't know that I still owe them and I have to pay before phoning to move the account to prepaid ,whichmmeans I am paying R281 for 2gig they put , how is it my fault to pay for something I was never told and where should I get that money cause even now I am being billed until I settle the account. This is a lesson I will never ever use of any MTN product, their champions are *********** and we must pay for it.