He could refund you but it looks like he doesn't want to and would rather take your money and say "LOL! RTFM, BRAH! GOT UR MONEY LOL!"

Would you like to see karma? Watch this. He paid a service roughly 10 SBD to upvote this post and the service used my account to upvote it. What I'm going to do now is unvote this post and then send you 4.5 SBD from my account.

My advice is to not use @chronocrypto's obviously ill-willed, greed-driven service. Check out smartsteem.com if you want to purchase votes for visibility.