a dealership technician crashed my car in a test drive after the service was done. I still have payments on it, what I should do

The dealer was your "baliee" and was supposed to fix your car and return it to you fixed. Any reputable dealer in this situation would accept full responsibility for your damages, including further repairs (this accident implies that the service was not done correctly if their own technician did this) and body work and a comparable replacement care while your car is being fixed. I'm not sure what the towing has to do with anything.

Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.

As I am licensed in Florida and Vermont, I cannot comment specifically on California state law. However, generally, every dealership usually carries liability insurance for such types of claims. You should make the claim against the dealership' s insurance carrier.