Unauthorised debit order

Since November 2015 my account has been debited by unknown companies taking the same amount (R99.99, R99.00 and R89) with different company names and reference numbers. The problem is that I am informed that the bank can not do anything about it. today on the 08th of February I was given African bank details being told that they are the ones to assist me investigate the matter. Can I please be assisted with this matter as the bank is charging lots of money to reverse these amounts.