User Activity

How can I trace back a seller? sold my mum an incomplete item? Am going to put a complaint through PayPal but would have rather settled nicely with them. Not to be.
My mother bought some covers for her stove only to receive 3 instead of four. Have wrritten messages, through myebay as she only logged on as a guest, but have not received any answers. I tries to tell her not to buy through ebay as it is very diffic...