Alhambra, door depleted

Hello together, we are just on vacation in Sweden and when we came back yesterday to the parked car, we had to find that someone drove us a decent dent in the side door, see photos. Unfortunately of course with driver’s escape – and without comprehensive with us. Police we turned on of course, but more than the accident could not record of course. No witnesses, no cameras, so it goes… The white, which looks like scratches, is only dust and dirt (where I wonder what the other car must have looked like when there was so much dust!). Doesn’t there seem to be any significant scratches, just the dent. But what I’m wondering: Is this a damage that has to be directed or is it a purely optical flaw? And do you have an idea how expensive that would be, i.e. can it be de-delled or must the door be replaced?