No Delivery and extremely bad service

Ordered and paid for a Tabled on 20 April, they said delivery will take UP TO 14 work days. After the 14 work days where over I called and was told they will check with the supplier and get back to me, but no one got back to me. I called again two days later and the same story. I then sent a on line query, got a email response saying they will check and get back to me, no one came back to me. I called again and got the the same story and yet no one came back to me. Send a follow up on the mail on Monday 18 May, got a mail back saying sorry it will be dispatched and will reach me in another 5 to 7 working days, this after its already 7 working days over the max delivery time. Also on the email they supp**** me with a tracking number and web link on the mail. But when I checked on the link and entered the tracking number I got a message saying that the tracking number does not exist.