Unexplained Hold on Account

Hello, my account says there is a hold which prevents me from enrolling in classes, but when I try to pay through Bruinbill it says I have no outstanding charges. I contacted student offices where it explicitly says they are open now on the phone but no one is picking up. My classes I need are filling up and unfortunately there is nothing I can do about. I contacted the messaging centre but by then my classes will be full that I could not enroll in on the first pass.

Help please, what do I do? Thanks.