Seller decided he didn't get enough for item so says he won't sell even though Ive won item

[janezzfox]

I have won an item on ebay they had set a start price but no reserve  I have won the item and the seller is saying its not enough money and wants 3 times the price - 

[plpmr]

get your refund, then leave feedback to reflect your experience - seller refused to honour transaction.