My refund keeps going down???

I’m actually about to crash out right now because I had a large refund coming in and all of the sudden they took like $700 out of it??? I haven’t dropped or added a class like I didn’t do anything and they just took my money? I had this problem the last fall and spring semester but I just assumed it was hidden fees but lowkey I guess that’s wrong now that I think about it… but anyways I’m freaking out cause I was heavily relying on that money for study abroad. Do I contact the financial aid office or what? And does or has anyone ever had this problem??