Eureka Forbes — Cheap and fake gift offer for selling product

Recently I bought a vacuum cleaner from eureka Forbes. As we are interested in paying in installments, the seller gave us a gift offer of providing a spyker watch worth 3000 rupees as a gift by paying the whole money once. So we pay the whole money, accepting the gift offer.
As per the salesman the watch will be delivered via courier within 15 days. And I get nothing so I contacted their service executive, they assured me to wait for the gift.
Finally I got the watch after waiting for one and half months from then. The brand name of the watch received by me is "Firstrank SONA". This is the scam happened with me.
I hope this complain help me.