Where else were you admitted that is affordable?
@twoinanddone is absolutely correct that the public universities in California do not provide aid to non-residents.
The State of California cannot afford to fund non-residents. These public universities are funded by the State’s residents who pay taxes to fund these schools.
Non-residents are regarded as “cash cows” because these students pay the full fees and dollars that the State of California desperately needs. Were you unaware of the fees? Assume $67k per year and a school in a very expensive neighborhood and city.
From UCSD’s website: https://fas.ucsd.edu/cost-of-attendance/tuition-stability-plan/undergraduates/undergraduates_2022-2023.html
ESTIMATED BASIC COST OF ATTENDANCE
|Estimated Non-California Resident Cost Totals
living with parents $58,491
on campus $66,441
off campus $64,836
“Mandatory university charges for tuition and student services help cover infrastructure and ongoing operations such as the delivery of instruction and the cost of student services such as registration, financial aid, remote academic advising and tutoring. Tuition and mandatory fees have been set regardless of the method of instruction and will not be refunded in the event instruction occurs remotely for any part of the academic year.”
> “International students who have been granted an F1 or F2 student visa, or a J1 or J2 exchange visitor visa are not eligible to apply for financial aid. International students admitted to UC San Diego must prove that they have sufficient funds available to them to pay for their educational and living expenses. Students are encouraged to seek financial aid funds from additional sources in their home countries.”
https://fas.ucsd.edu/applying/international-students/index.html
As per their advice, you need to find funding sources from your country.