Vodacom not cancelling a debit order

My mother has tried to cancel her data package a few times now and she keeps getting debited. We phoned in December to cancel (please check recorded phone calls) and again last week. They escalated it to FAIS and since then we have heard nothing. She is 74 and does not need this stress as her income is limited. We have taken another data package which is why this one needs to be cancelled (the 24 months has expired). PLEASE cancel this contract immediately and cancel the debit - PLEASE check the phone call in December on this contract and do the right thing and cancel the debit. The data cell number is *** . Please contact her on ***.