Nokia N72 — MMC rejected/invalid

dear sir,
i m manoj kumar sahu i purchase nokia N72 date on 22/02/2008 after six month working good but now some problem,
fault--power:phone restarts/reboots, display:fading, memory:MMC rejected/invalid, my job sheet no[protected]/080908/4 CHANDAN COMMUNICATION, SAI COMPLEX, GANDHI NAGAR MAIN ROAD, CHHATRAPUR. booked dt 08/09/2008 till date i am not recieved, plz see this matter, thanking you,
manoj kumar sahu.