VODACOM NOT WILLING TO CANCEL CONTRACT

First my fiancé struggled to cancel her month-to-month contract for almost a year where Vodacom still deducted every month after calling for cancellation multiple times. Now we are moving out of our place in 2 weeks and need our Vodacom fibre line cancelled but Vodacom is yet again being unhelpful after trying to cancel it multiple times and still haven't received a confirmation of cancelation. I need the fibre to be canceled by the end of the month and it should not be deducted off my account in April.