2018 Ram alignment help needed!

It does pull when cold. All the time. The more I drive it, the more it pulls and pulls harder. I drove it to the purchasing dealer yesterday. Sales manager was extremely helpful, service dept sucked ***. Told me to bring it back Thursday. I refused him and told him where the truck is parked is where it will sit until they fix it and it is unsafe to drive. Still told me to bring it back... had no car for me to drive... Sales mgr stepped up and gave me a recent trade in to drive home. I showed him videos of how hard it pulls and changes lanes W/I 5 seconds and he agreed I shouldn't drive it. I told service they really need to go over it well and find the defect because vehicles should not lose alignment.
We'll see what happens.