Samsung Mobile not working since purchased

Location/place: Shamli,Uttar Pradesh

Name of company/service: Samsung Mobile

Sir,
My samsung mobile is not working well since i purchased. It is in warranty. It has been repaired 6 times by customer care but I want its replacement or amount. Please help me.
9997655532
9286330002
[email protected]
Samsung Smartphone
Galaxy Pro Duos
BT 5512