Sony India Pvt Ltd — Tv is not working in warranty period

Dear sir,
I purchased a sony tv model klv-28r412b on[protected]. My tv is out of order since[protected]. It is in warranty period. I lodge a complaint to sony customer care, id 31499712, to attend my tv on[protected]. One person visited my tv from ranchi service centre on[protected] to check my tv. After that i contacted sony service centre many times, they reply that some part have to be replaced that is not available in india. They have sent the requisition to singapore. They are waiting for the parts.Till date[protected] i did not get any service from the company.
I lodge a coplaint by email also to sony custore care and my request has been logged as : 31566393. Till date[protected] i did not get any solution.
Here i have to say that how long a customer should wait to get service from a company. My tv is in warranty period it may be replaced by a new one. Otherwise, i should get the solution immediately. In the present time how long i family can do without tv?

Therefore you are requested to attend my complain immediately.

A. K. Pathak, qtr.No e1, nifft colony, hatia, ranchi 834003
[protected]@yahoo.com

Mobile [protected]