Not all of the Acadians went to Philadilphia. The majority of them went to Louisiana, but of the group that went to the former British colony, they were treated rather well by the people, and the priest of that city.
The place where the church was located is known today as Old St. Joseph National Shrine. It as founded in 1733 by the Jesuits.
Read about the story at http://acadian-ancestral-home.blogspot.ca/2013/01/acadians-exiled-to-philadelphia-in-1755.html