HORRIBLE EXPERIENCE

I have ordered 2 pairs of soccer boots size 4, then i requested an exchange for a size 3 they still brought back size 4, today they came to pick up the size 4 without the size 3 and they did not even credit me my money,this is the most horrible service EITHER THEY BRING SIZE 3 OF THOSE SOCCER BOOTS OR REFUND ME!!!!Premier Deportivo Soccer Boots Red/Black - Red/Black - UK 3 THATS THE ORDER THEY SHOULD DELIVER