2018 Ram alignment help needed!

Keep after them, my 2017 Ram shook hard when I first bought it.

The dealer gave me all kinds of crap, because I did not bring it back for 2 months, but it only shook over 65 mph, and the speed limit was only 55 mph on the way to work.

There was no balance weights on any tires, yet the dealer tried to make it out like it was my fault, to this day they have not sent me the paper work saying they balanced the tires.
My guess is they were a new dealership and did not want Chrysler to know they did not check the truck before they sold it to me.

And another thing is, I noticed the other day the front tires are wearing in a strange pattern, so something is not 100% up front, the truck only has 4K miles on it.