I parked my van and I went shopping with my wife ...

I parked my van and I went shopping with my wife on December 24, 2019 and when we went out they had stolen everything in my van, we went to security and told us that the cameras are aimed only in the supermarket, but that supermarket and this that not to safety on the parking lot, however, but before you park, read carefully because you can not stay no more than 3 hours, they make you a fine and that you have to pay, then who pays me for my damages that
done to me? , I want an answer from morisons, thanks