Unauthorised Debit orders

I enquired about services with webafrica in the beginning of December, in that process they took my banking details in order for me to make a profile with them. I never ordered with webafrica and to this day in fact not gotten any service from them. Thus far they have taken 2 debit orders from me and I have to reverse them. 1- I HAVE TO PAY FOR EVERY DEBIT ORDER I REVERSED!!!! 2- IT LOOKS VERY BAD ON MY CREDIT SCORE!!!!! Do not do any service with them! All they do is ***** your money!