payment due date change

i have a query regarding my account.back in January i changed my payment date from the 15th to month end of every month,this was because i had a reasonable belief that my salary was going to change.but on the second month i went back to be paid on the 15th and this has made to be in arrears because when my payment is due it is the time that i haven't been paid.and this is affecting my credit profile as someone who does not want to pay or who falls behind intentionally.and your consultants dont have a solution except me waiting for another six months to effect a change.is wesbank happy gaining from my arrears amount or my financial credit well being.this is a serious concern that you put gain or profit before your clients financial well being.