Nedbank robbes its clients

I have a cheque account with nedbank and for the past 6 months my account will be on a minus and and not get a clearity why, on the 09.07.15 my account was on a minus R887.48 and when i went to the braamfontein branch they gave me a lame explanation. on each and every transaction i make a get a notification hence i dont i understand the balance on my account now Nedbank is telling me that the amounts I recieve on my cell phone is never accurate as they have system problem and everytime i swipe with my card for more than R100 i pay them R90 for the transaction that was information given to me by a call center agent and the helpdesk agent told me a diffrent story, on the 26.05.15 i swiped my card at 4 times and the withdrew money after that my balance was at R455.68 and they are telling me that i swiped after i withdrew money and that i is false even their records can prove that. Please assist me get back the R90x3 that they took from my account as they took the money **********ly and i want me money back. Nedbank is exploiting us and this must come to end. Please assist me to get my money back