Change of surname not done after a week

I am very disappointed with Standard bank, I went to the branch on the 26th of June 2015 to change my surname and get my bank statement after the surname change and I was told that it will take 24 hours to update so that I can get a statement with the new surname, so I went on the 28th June 2015 to get my bank statement and it was 48 hours later and they told that the system didn't update and that a call will be logged with their support desk and I was told it should take 2 working days to be sorted out. I checked again on the 2 July 2015 which was over 2 working days and still my surname was not updated and I was told that it will only be done by 7th July 2015. I am very disappointed that a small thing like this is taking so long to be resolved, I should probably change to another bank that will not give me problems for changing my surname.