Phone [Q] Samsung international phone repair in india ?

Hi xda users ,
I got samsung s3 at&t as a gift from my bro and later it started giving out problem , I went to samsung repair center and they said that they don't repair international phones and they only repair phone purchased in india ... So i wanted to ask that some of you might have international phone and where do you get it repaired.I reside to hyderabad so any one who lives in india are appreciated.
Thanks,
Mujtaba naim

Phone model - gt-i9300
Service-At&t (Unlocked)
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