Debiting my account ********ly

On the 30th of March my account was debited with an amount of R119.99 by a company called STRATCOL LIMITED. When I called to enquire why I was debited they advised that the instructions came from PRESTIGE GROUP OF RECRUITMENT & TRAINING. I called them yesterday morning and spoke to NISA she said she would look into the matter and come back to me. She has not done so. Though my account was credited back with this amount, my issue is where did they get my bank details from? How safe are we in South Africa if strangers can just debit our accounts without us authorizing the transactions. <br> I would like to get a formal statement from them stating how they got hold of my bank details. I will not rest until I know I am safe. How many people go through this and just let it go because they do not have the resources to fight? Let them respond please.