1/2 year after receiving deposit, Peterbilt raised 15K on price

I am not 100%, but I don't think there is anything you can do honestly. And as @Siinman said how he thinks it was more so for Peterbilt and Kenworth drivers (I don't know much about all this), but the owner of a prior company I worked for had a Kenworth coming in (it was either Kenworth or Peterbilt, but I'm 99.8% sure it was Kenworth....sorry it's been a minute), they did the same thing to him. It's unfortunate, but it's inflation at its finest. At least they'll (supposedly) give you your deposit back at least I hope so Good luck though!!