money stoalen from my accout by GO loan Sandton

good day my name is Lindelwa, this morning the was 499 debited on my account, the bank gave me the name of the company debited my money and it happened to be GOLoan Santon , i dont even know the company, i was unemployedd for a while and i still have debt that need to be paid, how possible that i can get a loan with a bad payment record on my name, when i call their number is not goint through ********** 00 please assist