nedbank drowning me more debts

nedbank placed an authorised debit order for R704.40 on the 22/06 where i had only -5.19 left in my account and without having an overdraft the paid the unauthorised i am aware i am behind with my accounts and them putting such debit orders and i was charged R90 for that debit order and again on 26/06 i was debited R62.67 now i wonder if i will be charged R90 for that debit order now my account is sitting in a minus and i dont have transport money for the month of July , i am just making this complain to be known , i know i wont win this instituition and no one gave them Authority to debit this account ever but they did it anyway and my account is sitting in a minus , i am going through a difficult time financially and you driving me there its the second time nedbank does this and me as the small man on the street will never win against this corporate company my account will remain overdrawn , i will pay it later next month and i am closing all my transactional accounts with nedbank check the account and look at athe statement and my brother is using my account untill he sorts his account out to be paid in my account he has been paid in my account for the last 2 months and nedbank