Horrid Oversea experince(Bad Private Banking serv)

I left for vacation last month overseas. I specifically notified my banker to make sure all was in order with my bank card to be accessed overseas. During my time of purchases in Thailand I was notified that my cards have been blocked because it needed to be verified. This had not been done by my banker intially. During the course of my trip I had numerous problems using my card. I could not pay my bills nor could i go on any tours because my cash was depleted .This resulted in my wife and I loosing 4 days of my travel because I could not access my bank cards. At this time I have more than surplus funds in my account, which I could not use. I made several calls to my banker costing me about R2000, which did not help. This made my overseas trip miserable with tele bills that I had to pay. For my wife and me to get around we ended up returning most of our purchased items so that we could get around and make it back home. What a horrid experience we had to endure. Until today I have not been contacted or received no courtesy from my Private banker. What putrid service, what is private banking ?I need to change my banker with immediate effect or I will change my bank.