Damaged product

i have ordered my phone on flipkart and from the day of purchasing it was damaged and one by one new problems are occuring i went to service centre but they disappointed me one by one problems are rising and i am a central governmnet employee i dnt have much time for this because of them my side lock button is lost i want either they replace my phone or solve my problem but now they are asking me for money i brought this phone at a price of 13000 and they are demanding me extra money for the repairement but i i cnt give because my phone is in wrannty