Full refund only adds up to half the cost

[lawr1449]

I've been awarded a full refund by eBay but the amount I've been refunded is only half the cost of the item. I don't know what to do I've tried contacting an agent but that not working 

[**peaseblossom**]

You can contact ebay using callback on here:
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid