I don't understand. You get your internet via ethernet cable that appears near the tv area ?
Hope you bought TP-Link 723N on paytm with the 300 discount coupon (fp300) for new users.
And I am really sorry, as I can't suggest you anything on the adsl side. I never buy adsl routers and I always suggest buying a cheaper used modem on olx or quikr. Now that you have something on your mind I would go with the tp-link one, as I have only tp-link products (routers, switches, wireless cards, powerline adapters) and none have failed even with 24*7 operations. Their hardware is good, but sometimes they fail on the software part and using dd-wrt has solved the problems.