Game store

My mother have credit card with Game The problem is someone is using it without her knowledge,its not first time but yesterday its happened for the third time.she reported the matter at game they stop the card n gave her a new card , but still happend .we think the problem is at Game store because when she receive an sms the card was her .......can u pls help the old lady Alot is happpening at Jabulani mall game store when the pansioners use their sassa card to pay they ****** them by doing the cash back without their knowledge