Flyingron is exactly right.

First, you would need a legal lien on the car which has to be on the title. You don't.

A Notary can't give legal advice and states have laws against providing legal advice without a license.

Your ONLY choice is to sue in small claims court. And all you can sue for is money damages. No small claims court can order anyone to do anything. It can only award money damages.

You would then have to execute on the judgment which can be done in a number of ways.

The state probably has exemptions to execution. Here in FL a motor vehicle is exempt up to $1,000, so you probably can't even get the car back in collection proceedings.