Question about changing major.

I just noticed I was accepted as computer engineering, I put computer science as my second. This was a safety school so I really didn’t care when I applied, as the March ends I’m getting a little worried with all these UC’s denying me. How would I be able to change my major from computer engineering to computer science? When looking to change my major, it only gives me the option to change it to computer science: game design. Is there someone I could contact? Thanks.