Sent low SAT Subject test score

Test Preparation SAT Subject Test Preparation
1

I accidentally sent a really low SAT subject test score. Math I 620 and 640 to UC.
But I didn’t put those scores on my UC application so will they disregard those scores?
Should I contact the UC? and does college board allow you to cancel scores that were sent.

2

wait did you sign up for score reports before testing day?