Booking.com complaint: last minute 9 seat car cancellation

I have made a 9 seat car reservation, via ‘Booking’ a 9 seat car from leasys company. I received a ation for this order 3 month ago.

While I am on a family trip, with little kids, and less than 24 hours before arriving to get the car I have ordered,
I received an email from the company (Booking.com) that says: sorry, we cannot provide my car I have ordered !!! (Attached a copy of the cancellation email)
This completely ruined my yearly vacation that was planned, a family road trip to south italy, of 9 persons, with little kids !!

I was so mad, instead of enjoying my vacation, I had to look for a car, it was impossible to find any other 9 seat car, in such a short notice,

So , First, I was charged for the car, in advance, but did not get any !!

Second, I have made all hotel reservations for the trip in advance, for a whole week !!! I think it is illegal (on the rental company’s side )to cancel an order, on such short notice,
I really don’t care if it’s Rentalcars.com’s fault, Leasys fauls, but I want full compensation for damaging my whole vacation !!