mobile service in warranty

#1
I want to register complaint against karrbon mobiles, as i have given my mobile for repair in warranty on dated 14th Jan 2015 and still the mobile is not repaired, when ever i am calling them they say the part is not available and it will take more time, today it is already more than 2 months, i dont know how much time it will take.

please help to resolve the problem and do the need ful
 

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