Drexel acceptance but not First Choice major

I was super excited at first but then I re-read my acceptance info.

Degree: Bachelor of Science
First Choice Major: Computer Science
Major Admitted: Undeclared - First-Year Exploratory Studies (non STEM)
Accelerated Degree: BS/MS in College of Computing and Informatics
College: Goodwin College of Professional Studies
Major Admitted Co-op: One co-op (four years)
Entry Term: Fall
Status: Full-time

So it looks like I didn’t get Comp Sci as my major? I still want Comp Sci tho, what should I do?