All Beta chalk bags are made so that the drawstring cord can be replaced. At any point the cord is pulled out completely, you can fix this. Follow these steps.
Step 2) Grab the loop end (also the center point of the cord) and feed it through the metal hole.
Step 3) With both hands, use your fingers and thumbs to feel the cord pieces inside the bag. Push the fleece lining back inside the chalk bag between the cords. (This is the tricky part)
If you can not fix it yourself, please send it back. I'll be happy to fix it for you and ship it free of charge. Hope that helps!