I realize that the SIR deadline has passed, however, students are changing their plans/options at all of the schools, so I really would encourage the OP to contact those schools that accepted him and explain the situation and if my druthers are correct, I think both LA and especially Davis would lend a sympathetic ear.
UCB has rescinded my children’s acquaintances and they UCB don’t budge in their decisions. I don’t know why they do that; it seems so punitive.