Lost all of my FOB keys, what to do now?

I lost both of my FOB keys to my 2017 Volt, what to do to get a replacement? Can't drive my car. I think I dropped my last FOB key when I jogged for miles. Tried looking for it by retracing my path, couldn't find it, there were too many people, so someone could have picked it up.

Will I have to tow the car to the dealer for reprogramming for a replacement or shall I just bring my documents and they can do the reprogramming on the key? I can open the car with an app but no option to start it. Only precondition, lock and unlock, alarm... No remote start.