Well the first thing to do was to enter the correct code so that your FAFSA numbers would be transmitted to UCSB as soon as you learned that they hadn’t been sent yet. Did you do that?
Yes, their offices are closed, but people are working from home and should eventually get to your email. Try sending one again.
Where is your guidance counselor? Send that person an email too and get some help with this.
What have your parents told you about paying for college? Can they help you at all, or are you entirely on your own to find the $12,000?