Refund recieved only 80%, what about the remaining 20%

[inaci-au2014]

Hi, I have requested refund of an item it appears the merchant have done the refund but only 80% of the total refunded, I have not received the remaining 20%. The merchant has advised they have made the full refund and ask me to check with ebay. Does it take a while before I receive the remaining 20%?

[padi*0409]

Was the item coming from the USA or UK and the Global Shipping Program was used ?

What is the item number (RHS of the listing page) ?