Flipkart — Giving a warranty without model number

I have ordered for a Fastrack watch worth 3000 last year which has 2 year manufacturing warranty on Flipkart. Last month on August there occurred a problem with my watch which can be solved by free with company policy if I submit the warranty. When I reached the nearby service center of Titan they have told me that the warranty doesn't have the model number in it which cannot be taken. When I asked Flipkart they are sending me the old invoice only which is not acceptable by them. This was a cheating from Flipkart