Dischems worst service.paid for order never received stock

My order no at Dichem online for Product DS24 WHICH WAS ON SPECIAL OFFER.BUY TW0 GET 3RD ONE FOR FREE. ON 4 SEPT ALREADY I PAID FOR IT. THEN AFTERWARDS 2 WEEKS THRY CALLED ME TO SAY SORRY THEY DONT HAVE STOCK.I PHONED HAZELWOOD BRANCH. DINEO THERE CONFIRMED THAT THEY DO HAVE STOCK.I SEND A COMPLAINT TO DISCHEM. NO ONE BUT NO ONE CAME BACK TO ME.I NEED MY ORDER.AT LEAST I PAID FOR IT