Apple Watch face fell off

I have a 38mm rose gold Apple Watch for over a couple of years and never have I dropped or wet it and all of the sudden the face screen started to kind of pop up from the sides of the watch until it completely fell off. I don’t understand why this happened and if it’s fixable I would like to know where can I take it to get it repair as I cannot afford to purchase a new one.

[Re-Titled by Moderator]