Unhappy private bank client

I am a ABSA Private Bank client and I am starting to loose my patience with the lack of service from ABSA.

A private banker was allocated to me when I moved over to private bank and last year I sent him emails without getting a response (not even an out of office). Apparently he left ABSA and no one informed me about it. I visited the ABSA Private Bank branch and I was told that I have a new private banker, which I was not informed about at all by ABSA. He was not at the office and they told me that only he will be able to assist me so I sent him an email with all my queries. To this day only 1 of the queries have been resolved.

I have been trying to close a student account for the last 5 years and to change my surname since I got married last year and no one seems to be able to help me with these basic queries. I have contacted the call centre of three different departments within ABSA and they each told me to go to a branch for assistance but I no longer stay in South Africa so that is not a possibility. Why is it so difficult for ABSA to assist a client that lives abroad? All other institutions that I have accounts with helped me instantly with great satisfaction. Your service delivery is the worst and you lack proper communication.