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%?

[gutterpunkz05]

Is it the postage component of purchase that has not been refunded, sellers when processing refunds now have to confirm original postage charge is also to be refunded.

Note, if this is the case, the seller will have to contact  CS to rectify the matter, in my case ebay refunded the buyers postage at no cost to me.