not recieved item and no refund

I recently purchased a dress, the item wasn't posted, so I opened a request to receive the dress, then another week passed so I cancelled the request thinking I could rerequest a refund, but no after a lot of research it won't let me rerequest and now its 'my fault' so I don't have my money back or the dress, the item was listed a long time ago and the seller wasn't receiving my request. how can I get my money back if eBay won't let me get in contact with customer service.