FNB Dropping the ball ( Very Disappointed)

I am very disappointed and I do not feel valued as a client . Our agreement is that my debit order is on 25th . FNB decided to changed my debit order without informing me . This is the second month I am raising this matter and no one can answer me instead the call center advisors told me straight she has no idea . I reported the incident around 8 am and incident was only logged or escalated now at 16:00 . Meaning no one will look at my issue up until Monday since their operating hours is Monday to Friday . FNB is dropping the ball they been my number 1 bank for years and today I feel they losing it . Or are you trying to get my account into arears so that I can have higher interest . What you are doing is a breach of contract .