Amazon — Cancellation of products on deals and inappropriate behaviour of amazon staff

Address:	Hyderabad, Andhra Pradesh, 500049
Website:	Amazon.in

Amazon has failed to live up to my expectations. I ordered a watch for COD that was on deal. The watch was never received and I was never called by the delivery uys. Later when I called Amazon I was told the product was returned because I refused the product or it was damaged. Both of which are not correct. Now they refuse to ship the product back even though they say its from their inhouse selleer cloudtail. When I call Amazon I am being told that I am not correct andf the delivery boy is right implying I lie. I am also hung up on by the associates. They threaten to hang up if you confront them. Is there a way Amazon's behaviour can be dealt with?
The second order we placed was for a phone on deal. Amazon cancelled the order saying price error. First of all do they even quality check the delas they put on the website. Or this is a way of promoting your website. Cancel orders placed or return porders without customer's permission.