Absolutely you can fix it! You will just have to do a little hand sewing. If it is just seams (not rips or tears in the fabric) you can use a needle and matching color (or neutral color) thread and use tiny disappearing stitches catching the edges of the fabric on either side of the seam. Then bury your knots. I am sure there are some official stitch names but I can't think of them at the moment.