Bad service and delayed refund

I am not in a happy state with Nedbank, they first changed my debit order date from my salary date to a date that suits them I took the courtesy to call and inform them that my salary date is after the 25th of every month and the consultant that assisted me with my query told me she has escalated the matter. To my surprise on the 23rd I get debited, I immediately called Nedbank to ask and was told it's been fixed immediately on that day. Guess what on my salary date I get debited again. Now they have taken R15k in a month from my account. I called immediately a lady assisted and gave me a reference number, we both happy because she informed me that she escalated the issue to the refunds department and her line manager, yesterday the 28th I call to check how far is my refund only to get another surprise that my refund will not be done as it was not escalated correctly. I was then given a new reference number by another consultant who then told me I will get my refund as soon as Saturday the 30th. Today the 29th which is good Friday I call Nedbank to find out the status of my query to my surprise the gentleman who assisted me informs me that my query will only be attended to on Tuesday the 2nd as the refunds department only works during the week and not on weekends. This is really inconveniencing as I was **** to in the name of protecting the bank. I advise people not to have any relationship with Nedbank as they are unreliable and don't live to their motto or values. I am flabbergasted by the service received and will not partake in any future agreements with them.