After skimming through the thousands of posts on various sites yesterday (including the women's own Facebook page) it appears as if the dealer put diesel in the DEF tank when they filled it up prior to delivery. The fact that FORD Canada told her to go through her dealer is correct.
I had a brand new Hyudnai where the crank pulley fell off after 300 miles. I tried the same thing (going to manufacturer) and was told to go through the dealer. Ultimately my dealer stepped up and simply voided the sale and gave me a new one.
It is my understanding (again from her Facebook page) that she got rid of the Ford and got a Ram 3500 megacab. I don't know if the Ram and Ford dealers share the same owner or not.