Uninsured driver in an enterprise rental hit me. What are my options?

While I was driving in my lane, a vehicle to the left of me switched lanes into me and hit my car. She was driving an enterprise vehicle and claimed that she purchased collision coverage through enterprise. The policy information she gave the police ended up not existing, and enterprise also said that she did not purchase any coverage when renting the vehicle.

Is there anything I can do here except going through my own insurance and failing an uninsured motorist claim. Geico (my insurance) says that I won’t be able to get my damages paid out from Enterprise.

Thank you