When we bought a car we were directed by the dealer to an insurance agent, we chose and paid the full coverage. However never received the p

The agent and dealer confirmed coverage was in place so my daughter left with the car. We never received any insurance policy or forms to sign. The Agent kept on saying they were sent by mail. Almost 1 month later there was a little accident and my daughter was given the ticket. We called the agent who told us to call Infinity Insurance. We still did not have any policy papers. Finally the agent sent them by email and we noticed our address had been modified, obviously on purpose so we wouldn't see that the 6 months policy we prepaid did not correspond to what we agreed, My daughter who was supposed to be included as a driver did not appear in the policy, etc. The insurance threatened they wouldn't cover the incident as my daughter was not under the insurance. Finally the insurance paid the damage to the car. However, now the other party's insurance is charging my daughter who is a 20 year old student, $7.500 for medical costs when nobody was injured at the incident.... please help!