Unauthorised Debit order

I just saw a debit order on my account for R49.00 it was never authorized by me. And all 4 seemed to have started right after i renew my vodacom contract. It just says RESB PD-***-1 <br> This has been going off my account since end of March. This and 3 other R49 debit orders just appeared on my FNB account without any notification or paperwork stating that i want these services. It seems a bit ***** that Standard Bank has come up before with regards to this type of debit orders. FNB should really look into this<br> <br> i wonder how many other unsuspecting people this is happening to.