******* double debit of 2 contracts instead of 1

My mom and I have been trying to cancel a contract since December 2019. Contract number ***4 was cancelled and replaced with another contract. My mom is a pensioner and they continue to debit her account with 2 contract. We have gone to see the sales person several times. We called chabalala and SMS her. No response or call back or acknowledgement. We emailed info@amc... we faxed to 021761... and they returned undelivered. Awaiting a posit8and speedy resolution