cansome one please advise me here.

You'll need to make a custom plugin for it. Here's a link to tutorials on how to make your own:

http://learn.elgg.org/en/stable/tutorials/index.html

Their website says it integrates with Elgg. Assuming they have a specialized script that does this, they may need to update it. If they put it on GitHub or something we can assist them. If they won't, ask for your money back!