Parcel missing ,the status says "DELIVERED"

I ordered on Shein. On 14 April at 6:30am received a message to say order will be delivered within 24 hours. then 11:30 PM i got a message to say order delivered. Then I look at the delivery proof and its not my signature, not my address. Now I can get anyone to rectify this. I called IMILE and they management is busy with investigation, even now i havent received any communication from management. What is happening with this company. SHEIN should stop using them. I havent had any problems with the other companies.