Good evening. I would be happy to assist you.
Please DO NOT report it as stolen as this could seriously backfire on you and you could end up being charged criminally for making a false report.
As the owner of the vehicle, upon transferring ownership, you have an obligation to remove the plates from the vehicle. This is the sticking point that ICBC is falling back on. If you've not taken this action, then they have no other evidence to corroborate the fact that the car was sold. There's no transaction, no bill of sale, no new registration and it still bears your plate. Therefore, there's nothing to prove you are not the owner and are not permitting the vehicle to be driven.
So ultimately, your only recourse is to get those plates off the vehicle. If you know anyone in the Victoria area, why don't you see if they will recover the plates for you. Send them a letter that you sign, that they can carry with them if questioned by the police and have them take the plates of the car.
Alternatively, you could hire a private investigator to do the same thing for you.
At the end of the day, you need to get those plates off of that car.
I look forward to hearing back from you so that we may chat further.