Sony India — I have not got my sony sbh 50 for 3 monts from sony service centre.

Address:

Gaya, Bihar, 823002

Sir,
My name is saurav.i had purchase sony sbh 50 stereo bluetooth earphone on 5/9/14.
After few months it stop working properly (charging problem, sound breaks in earphone) .
I submitted my sbh 50 earphone on 11/8/2015 at GLOBAL SERVICES OF INDIA, SONY AUTHORIZED SERVICE CENTRE, KANYAPATHSALA ROAD, GAYA-823001 for its replacement.
But but sony service centre is not solving my problem for 3 monts and not giving me my bluetooth earphone for 3 monts.
I am feeling helpless and i m thinking that my money is wasted on sony bad service.