Furniture bought in Feb to be delivered in May

We went to buy couches that were on special at UFO in Malboro on Saturday the 27th of Frbruary 2016, told to pay in full and couches would be delivered in a week's time. Received a call today saying couches are out of stock and will only be available in May. How pathetic UFO!!!! How exactly do you manage stock levels???I would not have paid you if I knew you did not have stock, but you said you had stock and would deliver! Fix this please!!!!