Sony India — Need a answer asap

I am having a xperia z1 its 11months 25 days old i gave it to a sony service centre they are telling me there is a hardware issue with my mobile so they will replace it with a refurbished set...I wanna know if its not repairable why am i not getting a new set instead of a refurbished...plzz look into my matter seriously or else i have to go fpr other alternatives say consumer forum if i dont get a proper answer from yuor side my name is NEELAV KANKAN SARMAH my no is [protected] GUWAHATI ASSAM