I guess he just trying to scam you and not sure if ognasty does provide escrow service when transaction related to Fiat.Your best option is always avoid newbies when you want to do big deal.

For the funds as ognasty asked you to provide sign message, give him a sign message and take refund.If you don't know how to sign message https://support.coinbase.com/customer/portal/articles/1526413-how-do-i-sign-a-message-with-a-bitcoin-address-