Online purchase delivery after 3 days

I am a very unhappy and now a disgusted client. I shop a lot at MRP and I placed an order online Monday the 31st the evening and today is working day 3 and told when calling MRP customer service on tuesday it will be delivered during the day on Thursday,upon calling this morning i am told my items will only be delivered tomorrow by 12am. you give a time frame on the website 1-3 working days and then not adhered to. These clothing items are for for my sister and daughter for Casual Day tomorrow at school. What am i supposed to do with items no longer needed and after paying door to door courier. Why on earth do you use FedEx anyway, Fastway is so much better, i get items with in 1.5 working days from Jo'burg. This is my tracking number OFT1T***8 and this is my order number #***. If i don't get these items before 7:00 am tomorrow morning i will be taking this much further. As this is unacceptable. i did also post this on th MRP Facebook page this morning and still yet to get a reply or inbox or from customer services whom i called this morning also. This is a matter of urgency.