Sony Mobile — New Mobile Not Working Service Pending for 45 Days

Purchased Sony Ericsson Mobile Model W350 from Sony's Authorised Shop. at Jabalpur. Mobile Stopped working after 15Days. We have given the Mobile to Sony Service Centre IT Solution at Jabalpur on Sept 14 2009 wide their workorder No. SE309IT110314. Tday is Oct 23 2009 & still Service Centre or Sony People are not giving proper response.
As the Mobile I've purchase has manufacturing defect & it should be replaced or I should get my money back.
I Want to sue this company in Consumer Forum - so that people who are buying Sony Products should be aware of the poor quality of services & products of Sony.
So please let me know the method.