I Face Shein and iMile Delivery Delays for Dubai Order Before My Event

I placed an order from Shein with order number GSH1QS18000MMQQ, to be delivered to Dubai. The delivery was initially scheduled for 7 December, then it was rescheduled to 10 December, then again to 11 December, and I still have not received my package. I am really tired of waiting and the constant date changes without any clear explanation. I ordered these items specifically for an event taking place on 15 December, and today is already 11 December, so I have only a few days left and still no delivery. Each time I check, the delivery date is simply moved again, and I am not given any proper information about the reason for the delay. I request that my order be delivered urgently before 15 December, as promised when I placed the order. I expect Shein and the courier to take immediate action so that my package reaches me in Dubai before my event.