R400 PAY OUT - IF INSURANCE NOT CHEAPER

I PHONED OUTSURANCE DEC 2014 FOR A CHEAPER QUOTE ON MY YARIS THE QUOTATION WAS MORE THAN R800 PER MONTH WHERE I ONLY PAY R537 WITH DISCOVERY. TODAY WHEN I REMINDED THEM ABOUT THE ADVERT ABOUT THE R400 THE LADY TOLD THE QUOTATION WAS DECEMBER 2014 AND HAS EXPIRE I HAD TO REMIND THEM IT WAS FOR A CHEAPER QUOTE, WHAT IS THE REASON WHY YOU PHONE ANOTHER INSURANCE ? MUST BE FOR A BETTER PRICE!!!!!