Consumer Redressal

I HAVE PURCHASED A SAMSUNG MOBILE ON 16/11/2013 FROM SAVERA MARKETING AGENCY PVT LTD, BENTICK STREET, KOLKATA 13 BUT 10 DAYS AFTER THAT MY PHONE BACKGROUND DISPLAY OFTEN BECAME PALE & IT STAYS FOR FEW SECONDS & RESOLVE SPONTANEOUSLY. AS MY PHONE WAS UNDER WARRANTY PERIOD I CONTACTED SAMSUNG SERVICE CENTRE AT ESPLANADE METRO TWICE BUT THEY REFUSED TO TAKE MY PHONE AS THEY HAVING SERVER PROBLEM & ALSO DENIED TO GIVE ANY WRITTEN DOCUMENTS FOR THAT. THEN I CONTACTED GIRISH PARK SERVICE CENTRE & THEY CHECKED MY PHONE(BILL NO 4173929902)& TOLD ME THAT IT HAS LCD PROBLEM & LCD HAS BEEN REPLACED. BUT I AM FACING SIMILAR PROBLEM OF BACKGROUND DISPLAY OFTEN GETTING PALE. I WANT MY MONEY BACK OR REPLACE WITH A NEW MOBILE.