Man, that sucks! Your truck is one of my favorites on this site.
It's ultimately going to come down between your word and theirs. The guy probably felt guilty so that's why he hung around when you took those pics. I have a feeling he did speak english, but he said he didn't to avoid any confrontation. I get a lot of people likethat here in So. Cal that say the same thing. "Sorry, me no hablos inglis." The truth is, they do know how to speak english, but they use it as an excuse to avoid communicating with you. The fact that the landscaping company is not returning your phone calls raises a big red flag to me. You should have requested a police report right then and there. The fact that you filed a delayed police report may not look favorable in court. It obvious they're going to make you work for the money by playing the phone tag game. AZpro4x guy is right. If the guy claims it didn't come from his mower, you may be SOL. Liability disclaimers like those signs that read "such and such is not responsible for any damages..." serve not only to weed out people who don't think they have a chance to make these big companies liable, but it also serves to bolster their case, if it ever goes to court, by implying you didn't take "reasonable effort" to ensure mitigation of damages on your part. In other words, did you take reasonable effort to not follow too closely behind the spewing gravel truck? Did you take reasonable effort to avoid the big pothole sitting out in the middle of the road?" That kind of logic. In this case, there was nothing you could do to avoid the rock hitting your truck, so you're good there. If you have to take them to small claims court, you can always use the safety defense and say how dangerous it is for them to be mowing lawns against traffic flinging rocks and debris across the roadway. A few witness statements would be good too. At any rate, you'll have to determine if it's worth the time and money to pursue a small claims case if they decide to not pay. The cost to have the dent removed by a PDR guy will be around $75-$150. Then, you have the cost to repaint the door which will be anywhere from $150-$300. Even though the damage is relatively small, they're going to have to clearcoat the whole panel for a proper paint repair and that will require removing the trim, mirror, moldings, emblems, etc.