Dear Amit,
You are not one and only seller who face this problem. Same things happened with me too. A buyer paid me on 7th March but till date paisapay support team (!!!!) pending payment for proccess. I had already wrote thru email to paisapay staff on 10th march but didn't got any answer.
So, don't Worry, have patience.
Best luck,
Alkesh
Note: one more surprise....you know that ebay have a toll free no. ? (don't try it,coz you will get more frostration after dial that no.)