The Emart — Dameged or defective product and not giving refund

Address:	New Delhi, Delhi
Website:	www.the-mart.in

Sir i bought a MI POWER BANK on the emart shoppig site on 15 oct 2016 the power bank is a defective or a dameged and i do them mails or call but they are still not responding and not changging my product and not giving any responce and the site is showing under maintenance and his phone number is showing busy i call and mails him lot of but they still not responding