Was anyone in your car at the time? If not I'm not sure what accident compensation they could be referring to.
So it could just be a coincidence- we all get these calls about accidents we never had or where a few questions make it clear they have no idea when the accident was or what my name is or what my car was. They use automated calls because they know they have to ring dozens before they strike lucky with someone who has had an accident.
Sometimes, though, repair garages pass on details to accident claims companies but these claims companies wouldn't then use a automated one if they were sure there was a fair chance you have had an accident