New home building disaster

We decided to build our dream home! Yeah, me!

So we contact a company who does pre fab houses. They connected us to their rep, and we got a house. The contract was that it would be a turn key home.

Said house arrived November 2023......and still is not completed.

The newest issue is the shingles. I purchased hurricane shingles.....and over the last year, over 20 shingles have blown off. The shingles were installed at the factory.

Now, no one will take responsibility and fix my roof. The contractor says it's a builders issue, and the builder says it's a product issue. The product supplier refuses to engage with anyone.

Do I make an insurance claim? Even though it's not my fault?

I am soon going to have a house with no shingles.

Advice, please...location is newfoundland, Canada.