Sigma Couriers — taiji uniform order online via taobao not deliver

I have order blue colour taiji uniform online via taobao on 2017 december 02. Order items are size xs — 8, s — 7, m — 13, l — 6, xl — 2 total order is 36 set. Which cost 3758rmb. My order number is[protected] [protected] till to 2018 march 12, i have not receive any news from sigma courier service. I have check with 大辩子， they told me that my order has been send out and sigma is the courier service to receive and distrubute to coustomer. I hope to receive my order as soon as possible. Otherwise i would ask for a refund.