Having issues with supernova julia necchi
I have recently started working with a vintage sewing machine a supernova julia necchi when I first started sewing on it I noticed right away that I had it threaded wrong. After fixing it I then realized that it wasn't sewing right, I finally got it to sew but the ends of the fabric won't stayed sewed. I'm very upset about this because it is a nice sewing machine but I really want it work and its not sewing like it should be. Please help me understand why its not sewing right or if I need to take it back to have it worked on again? The picture is similar to the one I have.