Useless Online Retail Service

On the 24th of November I placed an order for an item that was part of the CNA 3 Day Rush sale. The website stated that it would be delivered in 3-5 working days and that I will be updated in case of any delays. 8 days later I contacted the helpline to find out why my order was still on pick. I was told that the matter has been escalated and that I will be called back. No call so I followed up. i was told that the order was sent to CNA Menlyn and they were waiting for stock. I phoned the shop and they said that it was on back order and will have it to me by the following Monday and I will be phoned back. No call, so I followed up with Esther. She said she would call me back. No call, so I phoned Esther back and was told that the product was not actually available. Then I was told I would get a call back with an update by 12:00. No call again, so I follow up with Esther the next day. She said she was still waiting for an update and that I will get a call back by 09:00. No call and now I simply get a mail that my order has been cancelled. This has been incredibly pathetic service by CNA. All I have received are empty promises and now I will never get was I ordered.