First time buyer, worst experience, terrible

On the 14/05/2016 I made a purchase on the Dunns website for delivery and I was so happy that I got a confirmation from them. 16 May I got an sms and an email with tracking details and that the order has been shipped out, one happy customer. Little did I know it will not be delivered at all. The following week on Tuesday I went to their website chat and made a follow up with the order but was told that the drive could not get hold of me and the order would take 3 to 7 days to be delivered not a problem. Spent the rest of the week seeking answer but nothing positive came out and the 7 days passed. On the 21 May went back to the chat and spoke to Masego all she could say was that she as escalated the matter with their warehouse and delivery will be made on Friday latest Saturday, and also got an email from which stated ( Good day, Thank you for your recent order with Dunns.Our courier driver has been trying to contact you regarding the delivery of your order, but unfortunately, the calls have either gone to voicemail or remained unanswered. To assist you as quickly as possible, we kindly request that you provide us with an alternative contact number.If you need any assistance, feel free to reach out to us.Thank you for your prompt attention to this matter. Warm Regards,Fezile Sibiya waited both days and nothing was delivered.) I waited for delivery but little did I know that I would be disappointed. On Monday 25 may I spoke again with Masego who told me that I would get my delivery tomorrow as it was delivered to a wrong address and the issue has been sorted with their warehouse and they are sorry for the inconveniences. I believe as I am treated in a manner that is not acceptable as I was previously told that the personal details including my contact were not correct as I placed an order, why is it that people can not acknowledge their mistake from first point instead of waiting for the customer to request details of driver, supervisor and the managers to log a complaint. This is not acceptable as I have waisted so much time waiting for no delivery and lost a lot. Someone must just answer or is this how people are treated