Just to play Devils advocate here, even if the PCM was replaced, it still would have the correct VIN programmed into it, or else the truck would not run. Now if the sticker has the VIN on it, that may help, but even original PCM's can be sent in to be "unlocked" so a tune can be added......I am in PA north of Philly. A lot of this is over my head being new to the Dodge scene, but I confirmed my PCM has the same vin as my car, so it isn’t a replacement.
I bought the car in early January and just didn’t realize the issue until shortly after. The dealer does seem intent on fixing or reversing the purchase if it can’t be fixed.
I have an appointment with a dodge dealer on Wednesday that will hopefully resolve this. I’ll update following.