Nokia 3110 — non functioning of memmory card

I have purchased a mobile handset no.3110 (IMEII:[protected]) from your dealer"MOBILE ZONE", Land Mark Centre, New Bus Stand, Kasaragod, Ph:[protected] on[protected].The memmory card distributed me by your company has been become complaint for two times> Now the memmory card is workless. I have bought the handset including memmory card 512MB (Micro chip) good faith and trust. Hence i am infirm believe that you will make a good as and when approach you.