Amazon India — Product not delivered on time after the payment

Address:	Kolkata, West Bengal, 700008
Website:	amazon.in

I had ordered sunshine rocking chair and baby bouncer with soothing vibration and music on 11april '17. It was communicated the product will be delivered by 17th or 18th of april 2017, but till now no one attended to deliver it and also no update is there. Now when i am trying to check the track details it is showing product is returned back to the seller. What is the matter? Is this a joke? I already paid for the product to get it on time.in turn i have to face these sorts of issues. Please update and make the delivery soon as i will be out of station within very few days.