Shpock

I've emailed shpock three times about a bag I bought on shpock. The seller actually wasn't the owner of the bag. She copied the listing from ebay and pretended it was hers. So I opened a paypal case. She then left me abusive feedback on shpock which is still there! She's scammed other people but continues to trade on shpock. She needs to be blocked and the feedback removed but shpock does nothing!