I don't know that it will do much good to get the store manager involved. They may just fire her on the spot for violating store policy against soliciting outside work while working as agent for JoAnne. The store was not recommending her to you as a seamstress. Like I said before since she isn't responding to your attempts at contacting her, finding her at her job may be the only way. If the manager or other personel overhear your conversation then well that is the risk she took when she offered her services in the first place. I guess you both will have learned a lesson in this, but you should not be out your fabric and your money. She needs to return it all to you.