Cheque account, its a trap!!!

After being convinced by an absa staff member to change my account from savings to cheque, being promised a once off charge of R107 they started charging me between 500 to 700 per month, upon enquiry they told me that it was defaulted to pay as you transact, they refuse to reverse the extra charges saying its not allowed despite their mistake, i was not even allowed to lay a complaint, stating that it would make no difference by the manager, Martin Grobler at Savannah Mall polokwane branch.