I bid on an item 11 days ago,accidentally bid $577 (shld of been $5.77) emailed seller 2x,seller not responding,What is the next step? Ta..

[pj*bear]

The auction has now ended with me winning the auction,I explained my situation to the seller & asked for a bid retraction,seller has responded to one email, asking me if I still wanted the item, I sent an email saying that I had in fact contacted him 9 days before he emailed me,I told him that I did not want the item anymore as the price was more than I was wanting to pay for a nintendo game,I have emailed him a 2nd time repeating what had said previously in the first email, it has now been 4 days since I sent the 2nd email & the seller still has not responded,does anyone have any suggestions of what I can do next pls..

I don't understand why some sellers & some buyers find it extremely difficult to anser an email?

thanks