The proctor followed College Board policy: " If you fail to comply with these Test Security and Fairness policies, you may be dismissed from the test center, and your scores may be withheld or canceled. If you are dismissed from the test center prior to completing the test because of failure to comply with these Test Security and Fairness policies, your test fees will not be refunded. " https://sat.collegeboard.org/register/test-security-and-fairness
You did not: "What students must leave at home…Scratch paper; notes can be made on portions of the exam booklets or, for Chinese Language and Culture and Japanese Language and Culture, on scratch paper provided by the proctor
from https://professionals.collegeboard.com/testing/ap/test-day/bring
The fact that you were dismissed in front of others was a direct result of your choice to violate the rules.