Can you just post all your pm`s here so we can decide on whats going on.
Part of the story is in your screen caps, but its better to see the whole picture here on whats going on.
It can be also be a simple as the person had to do something urgent? and have then respond accordingly and worst case is your chargeback scenario which you can do at anytime.
Yes something urgent..... That is why he was online after this at least 4 hours and did not reply to my messages, Look guys I not really care for 10$ if he is happy let him take it!
So... Did you or did you not confirm with a reply to @03:23:12PM DoniAiikya replied asking for confirmation on address? If you did, show the message. If not, why should DoniAiikya send you the bitcoins if he asked to confirm address but you did not reply? If we cannot be certain what you did, aka the complete story on your side. We cannot neg DoniAiikya anyhow despite it being really a scam without full disclosure on your part