Motorola V6 Mobile — defective piece is sell by the company

Dear

myself abhinav rajpal i buy the motorola v6 mobile set for hotspot showroom vikas marg 4 . the purchase date of the set is 16 october 2008 after purchasing phone goes under maintanence 3 time but now also phone is not ok there is a tecnically falt in the phone and phone is on guareenteed period . I also take the care pack of hotspot which also give two years guarantee but i am going hotspot several times to ok the set but now they told they cant ok the set and they not also replace the set .they old only 50% of the current value of the phone is got back pls clear this things and get back my all money or replace the phone Pls gave the possitive steps and help me as quick as possible

model no :motorola v6
IMEI NO [protected]
VALUE :10600 CONTACT NO [protected]