EXTORTION

Ive NEVER GIVEN ANY PERMISSION TO DEDUCT ANY MONEY FROM MY ACCOUNT, YET TO MY SURPRISE I GOT NOTIFIED VIA MY BANKING APP THAT I HAVE TO PAY R3X4 FOR DECLINED TRANSACTIONS THAT WENT OFF MY ACC FOR THE AMOUNT OF R44, 93. I WILL KEEP ON SENDING REPORTS LIKE THIS BECAUSE THIS IS RIDICULOUIS, AND EXTORTION. WHERE DID THEY GET MY SIGNITURE OR BANKING DETAILS IF I NEVER GAVE IT TO THEM???