Non Payment of Credit Due to Customer

Disgraceful service from DSTV (Multichoice). Since July 2019 have ********ly and without authorisation debited my 89 year old mother with R8899.00 whilst her account was full paid up. Despite numerous emails and telephone calls I cannot get them to refund her. They never even informed her that her account was in credit. Last 4 emails have been ignored. Spent over 30 minutes on the phone again today and despite a promise that the manager (Sashin) would call me, have heard nothing. This has caused my 89 year old mother extreme inconvenience and distress as well as a loss of interest. Have no alternative but to instruct my Attorney to institute action for repayment of amount due plus interest thereon as well costs on the Attorney and Client scale.