I’ve bought these bags both from Woot and Amazon and had the same experience. They broke. Both in the same place after just a few months. Cheap thin plastic clasp.
I’m not sure when you ordered it, but hopefully you let Customer Service know about the issues.
I think that can be repaired with a quick links that joins chains and has threads and a nut to close, you will need one the width of the plastic clasp that broke and if your not handy with sewing a nylon strap to form another loop for the replacement plastic clasp try using a length of paracord to join the plastic clasp to the quick link. I had a plastic clasp that broke on a non critical point on my backpack and thought it would work but it wasn’t a priority so I let it go. The quick link I bought is a 10 pack of 3/16 inch for $10 on amazon and if you don’t want to worry that it’ll come undone use loctite.