Shoppingmantra Enterprises & Rediff Shopping — Item not delivered

I ordered on Shoppingmantra Enterprises online through Rediff Shopping vide order no. 5629027 on 15 Oct '09. 'Track my order' shows shipment delivered on 22 Oct '09. On that day there was no one at home to receive the shipment. The shipment no. of Aramex courier shown by 'Track my order' page is not recognized by Aramex's 'Track your shipment' page.
Rediff shopping was intimated several times by email. But they also have not taken any action.
I am beginning to feel even Rediff Shopping is as much responsible as the vendor here.
All online buyers, BEWARE! Be careful while ordering anything from Rediff Shopping.