I think I found the error, you sent 0.250 SBD to upvote https://steemit.com/introduceyourself/@edensgarden/a-new-voting-bot-edensgarden, a post that is 3 months old. I don't think the refund algorithm accounts for this. I have refunded you 0.250 SBD from @taskmanager.
I believe you intended to upvote your comment within that post but pasted the incorrect url in the memo. Because I am a nice guy I upvoted the comment you intend to use the service for at no cost.
You're Welcome