Sorry, no one here can do that for you, we are members like yourself.
You are in the UAE are you sure if buying from a seller here in the UK, that the seller posts to your country? Not all sellers here post internationally.
If it's still an issue paying to those who do post to the UAE, first log out of this UK site, and log into www.ebay.com and ask Customer Services there, if they can see where the issue lies.
Here's the link you need for CS :
Contact eBay Customer Services this way, through their help pages.
https://www.ebay.com/help/home
Lines are open between 5 a.m. and 9 p.m. Pacific Time
@fakhe-ae2014