One Plus — mobile( model 5)

Address:

Dehradun, Uttarakhand, 492099

Dear Sir,
I have purchased One Plus Five Mobile set from Amazon dated 19th November18, But in the month of March18 it was dead .As there was no any Service center at Raipur that time, so I managed to sent it to Banglore service center in April18, and received after repair.But again it gone dead in the month of July18, As this time there is a service center in Raipur, so I given it to Mahamaya Infotech Raipur for service. But they said problem is in Mother board and seems physically damaged so it can't be repaired under waranty.
So I contacted customer care also insisted them to replace the set but both said It seems you have given the set for repair some where else, where this thing happen, I said who under waranty wants to give the set some where else other than company service center, and want to spend money for repair.
But remaining on their excuses they refused to replace or repair free my under waranty set.
Please help me to replace the Mobile.
All the papers regarding attached .if required I may provide my customer care recorded conversation and mails sent and received by me.
-I am also attaching Mobile bill, Screen shot of pick and drop message of Banglore service center, Raipur service center receipt.