my iPhone 6s is not switch on

Dear

i am not able to power on my iPhone what should i do

before one year 12/12/2016 i have replaced my new iPhone 6s and right now after one year my iPhone sucked and switch off again 11/12/2017 same date on which warranty has over so some one can give me a proper solution what i will do

i have visited apple service store they did not any thing els