poor service

I have being changing my debit dates from june for my personal loan and yet again absa debits me on the 25th when I suppose to be debited on the last day of the month , now there's R276 bank charges and reflects poor itc record on my name when I contacted the bank they said the will clear my itc and reimberse my money but did not do nothing yet I loged a complaint with absa in july about the same issue they did nothing and every month I'm payn bank charges for no reason at all I'm fed up and don't know what to do even going to a branch is no use all they say say they will put me through complaints dy can not do anything I'm running out of patience and don't know what to do anymore every time they call me to resolve this matter they say the same thing and then do it again I was promised to be reimbersed for july and aug but even in september I was not reimbersed but charged again for insufficeint funds coz dy can't. Change a simple debit date