Unauthorized debits

Money going out of my account this morning that I didn't authorize , when calling my bank they tell me that money is been taken by Capital Computer Bureau (PTY) Ltd, Address: 1 Edward St, Hennops Park, Gauteng, 0157, South Africa City of Centurion , Post Office box: 7693, Centurion, 0046, Phone: ***....when calling them I was put on hold for about 45mins I hang up the phone and called them again this time with no luck of my call being answered ..This is ***** and im not going to let them get away with this .