Samsung Star C5233 — Fault in handset, purchased on 10/7/2009. No response from Planet M till date.

Purchased hanset (Samsung Star C5233) from Planet M (Add. : Shop No. G4 & G13, Vikas Chambers, Plot No.1, 2, 3, Community Centre Block-A, Paschim Vihar, New Delhi-110063)on 10/07/2009.
The fault was of the improper shutting-down and restarting of the handset by itself.
The retailer i.e. Planet M are providing no response against the complaint filled to them.
The above handset was submitted to them on 07/08/2009 and till date it has not been rectified.
Don't know when we will be getting the hanset back.