Tyme Bank has card Duplicate *****sters

My Mom is a pensioner and my twin sister had sent money to her account a day when she was about to withdraw the money she saw the first SMS that someone has withdrawn R1000 cash from her account a few moments later the person withdrew R500 from the account.The highest probability that Tyme Bank has *****sters who duplicate cards of innocent pensioners especially because these people find it easy that you can open an account at pick n pay Please give my Mother her money back and stop *****ing people