Femme Paris teal prom dress needs repair 6

Tealish lacey prom dress. Femme Paris. The lace and embellish on here are gorgeous! The strap has come undone on one side and the zipper sticks so it doesn't zip the greatest. It looks like it came undone from the inside from where it was stitched down. There is also a small stain. This would make an amazing DIY Project for someone who can sew. Comes w the shawl. Size: 6