Disgusted client

As a loyal client for over 25yrs of standard bank the last month ive lost all trust in standard bank as a financial institution for the way they do business nd how they cn literally without blinking an eye rob their clients of their hard earned money for mistakes they caused due to the incompetence of one or the other worker nw u as the client is left with extra debt on a homeloan that increased by almst R100000 nd after alot of queries r left with R64000 in excess dept on a homeloan which they say nw they cn do nothing about nd u jst hve to pay nd to rectify their mistake jst increase ur installment cz its ur fault they didnt knw wot they were doin so im jst wondering how important are their clients really to them if they willing to rob me as a client as they did me