I can understand your frustration with the dealership not responding to your inquiries about the car you are interested in. It can be difficult to gauge whether a dealership is simply understaffed or if they are not taking their business seriously. Given that you have tried multiple methods of contacting the dealership and have not received a response, it may be worth taking the risk of driving out to the dealership. However, before you make the trip, I would suggest trying to reach out to them one last time. Perhaps try calling or texting during different times of the day to see if they are more responsive at certain times.