ABC — Warranty extension not done

I purchased a sony vaio laptop from a dealer in nehru place in oct 2011. I paid him an amount of rs 2500 for the extension of my warranty. But he never handed me any kind of documents/ warranty card. When I turned up in july 2013 at the sony service center for a complaint regarding my laptop, they said you need a warranty card for the warranty to be used. When I contacted that dealer, he made a fake dated bill: may 2012(as the warranty can only be extended within 1 year of purchase) and asked me to go to a service center that apparently his friend owned and he asked me to tell them to get my warranty extended. When I got to that service centre, the person asked me to get my laptop serviced at his service center and that he will get my warranty extended. As my laptop had been dropped once, he said that the warranty does not apply to any device which has been dropped. I gave the laptop to that service center .I had to pay rs 1125 for the laptop service which should have been free under the warranty. When I got my laptop back , I enquired to the person in charge of the service center about my warranty extension. He says that he wont do it because the nehru place dealer(who is a freind of his) is not paying him the amount for warranty extension. When I again call the nehru place dealer, he says it was my fault in the first place that I did not get the warranty extended at the time I purchased the laptop. He says that you had to register online for the warranty to get activated, which he never told me at the time of purchasing. He says that he was just trying to help for the sake of relation otherwise, nothing could have been done now... In the end, after going through all this, I found that the rs 2500 amount that I gave to the dealer has gone waste for me.