Struggle

Today was my forth time in the bank. In November I tried 3 times to change my ****en name to my marriage surname on my account. Each time they have a different reason why cannot change my surname. Today I tried again. The last time they said they want a proof of address. When I got there, there still an issue. I told the person that this is my forth time here so he was not in the mood to help me because is struggle so many times. So nobody wants to help even if I was there 4 times. I do not understand why I have to struggles to badly. Thanks