Ebay.in — Seller not giving refund

Address:

Dehradun, Uttarakhand

I ordered phone HTC one m8 from eBay.in on 4 Aug 2015.I received it on 9 august 2015...but the phone is defected so I raised a claim against the seller of the phone...then the seller called me...seller name is Ranjit Paryani . mobile no. [protected]...he said that he will replace my phone...at that time the claim was closed...he send replaced phone to me...i recieved the replaced phone on 25 august 2015 but the replaced phone is also defected...now the seller is not picking up my phone..& the members from eBay are not helping much ...they said that seller will approve refund...but the seller is not picking up my call...not even replying on mails...also blocked me on whatsapp...