Footgear

I bought 4 sneakers online on the 26th November and on the 3rd December I recieved on 3 sneakers. Immediately I called their online department the lady who picked up the call confirm that they have dispatched only 3 sneakers and there was an error she promised to call me the next day to fix the error but she never called. Monday the 6th December I called there was no answer on Tuesday 7th December I called again I spoke to the order lady she said she will ask the lady who assisted me on the 3rd December to call me back. Today the 9th December when I call them it says the number doesn't exist. My order number is 403916 contact number ***