Unfair Treatment of a long term client in good standing with Standard Bank.

I have been a longstanding client of Standard Bank for more than 30 years and my numerous accounts, including current, loan, credit card, unit trusts, investments, hone loan, share accounts,etc. have been impeccably conducted with no dishonours. Despite the aforementioned and updated details on file, Standard Bank dishonoured my bond payment for the 1st time in 30 years without the courtesy of a call. Their debit order run takes place before my agreed payment date on the 20th of the month as you will note that I manually effected the payment on 20th May 2020. Even if there was an oversight, a courtesy call for a good standing client would have been appreciated from my relationship banker who incidentally has never contacted me in decades, despite the exorbitant monthly bank charges and interest that I pay for good service which is clearly lacking. Their are plenty other Banks with cheaper fees and before I terminate my relationship with Standard Bank, I will appreciate a call from Executive Complaints Dept. to understand the basis of the Bank's unwarranted action recently that has now blemished my impeccable record.