Extremely appalling service

I've been to the Nedbank Clearwater Branch twice and called in once over the past 9 months regarding the change of my surname to my married surname. To date my cheque account statements and linked to on the Nedbank app still reflect my ****en surname and the UIF says that they can't pay my maternity benefit as the bank account does not validate with my married surname. I am appalled at the service from Nedbank, how difficult can it be to have my surname changed. I've been a Nedbank customer since my first employment 20 years ago, clearly it's time to change to a more efficient bank!