Problem changing AppleID Name

Hello,

I am having problems changing my AppleID name. On Apple ID summary, it shows my moms name. Before I was 18 the billing information was under her name. Now I have changed it to my information. When I go to "Account Details" it shows my information, but when I go back to Apple ID summary, it still showers her name. How do i fix this or who can I talk to, to get this changed?

thanks