Order not received.

I placed an order on the 26 November, my order was sent to Buffalo by Friday 8 December. Monday morning I saw it was returned due to my cell number being entered incorrect but I have changed it on the Shein app as I was told by 1 of Buffalo consultants via the online chat. Tuesday morning it was the same issue. I still haven't received my order as it is now with Fastway couriers where no one can inform me when my order will be delivered. This is highly unprofessional. I've tried contacting the call centre but it says the numbers are unavailable. When I contacted Fastway courier they couldn't give me any information and I wasted over 30minutes on a call to be transferred to different departments