Nokia Handset 2630 — replacement of defective set for new

I had purchased one NOKIA handset 2630 on 28.02.2008 vide invoice no 6107 from DESIRE COMMUNICATIONS 30-31, sarabha nagar, main market, LUDHIANA, PUNJAB . Right from the date of purchase the set is giving complaint of swithching off automatically.We have made several complaints to the NOKIA CARE CENTRE at mobile super market scf 5, model ext. market, near new krishna mandir, ludhiana contact no[protected] e mail msm-ldh @nokiacareindia.com.Every time i ask them to change the hand set they run it temporarily and put me off.You are requested to please help me in getting my defective handset replaced. The detail of my handset is ESN/IMEI NO.[protected] PRODUCT CODE 0549379 WARRANTY REF NO APAINY[protected] MODEL NAME 2630. Now as per the job sheet made by the nokia care they have given me the date of 30.06.2008, after rectification of fault.