Consumer Redressal

I HAD PURCHASED A SOFA CUM BED FROM MODFURN TOPSIA ROAD BRANCH. AFTER FEW MONTHS WHEN IT WAS UNDER WARRANTY PERIOD THE FOAM OF THE SOFA GOT COMPRESSED AND WHENEVER SUMONE SITS ON THE SOFA IT HURTS BADLY ON THE BACK. AFTER MAKING A COMPLAIN THE SERVICE PERSON HAD VISITED AND SAW THAT THEW FOAM WAS DEFECTIVE AND SAID THAT IT NEEDS TO BE CHANGED. THE COMPANY IS NOW TELLING ME TO PAY FOR THE REPLACEMENT OF THE FOAM A SUM OF Rs. 600/-. I SADI THAT WHY SHOULD I PAY WHEN ITS AN MANUFACTURING DEFECT AND STILL UNDER THE WARRANTY. NO ACTION WAS TAKEN BY THE COMPANY, AFTER REPEATED COMPLAINTS BEING MADE ALSO. WHEN I TOLD THEM THAT I WILL COMPLAIN TO THE CONSUMER FORUM THEY TOLD ME THAT YOU CAN DO WHAT EVER YOU WANT. PLEASE HELP ME TO GET JUSTICE UNDER THE CONSUMER REDRESSAL ACT