Did not deliver my package! Worst courier!

I am disgusted with the service I have received from this company!!!!! I placed a order on Cotton On on the 20th of Dec, which was supposed to be my daughter’s Christmas dress and till today, 28 Dec, I have not received my package!! I paid extra for overnight delivery, which defeats the whole thing because 8 days later, I haven’t received my parcel. I have been sent from pillar to post and promised nothing by this company, with no one calling me and apologizing for this inconvenience. I had to spend more money and buy another dress for my daughter. Their consultants don’t care a dam about this inconvenience! I honestly hate this courier company and I hope and pray that retailers reconsider doing business with them because I believe that I am not the only one who has issues with their lack of prompt delivery. I have sent countless emails asking them to send my package and still 8 days later I don’t have the dress!! Very disgusting!