Personally,if I thought someone had my car I'd be round there within the hour picking it up,with several mates as well,always plenty of people to help in these situations.
There's loads of age stamps on a Cossie so if it's rung to a completely different year,then it should be easy to prove.
It comes accross a bit of an understandable rant but it's difficult to understand in a big clodge of text like that.
Perhaps watchdog maybe able to help?