Terrible customer service. Lost my package in the warehouse.

I have been trying to get a hold of Fastway now for 5 days. No one answers the phones at the warehouse or offices. The WhatsApp line connects me with an Ai that can't help me. Now fastway have placed me in an incredibly bad position as my package has not yet been delivered to me even though it arrived in the warehouse almost 10 days ago. When I did get through to an agent eventually I was told that they are escalating my query as the package is still in sorting and has not been dispatched yet. From what I understood, they have lost my parcel somewhere in the warehouse. (Just speculation) now I need this packaged urgently as I'm leaving the country tomorrow and this should have been delivered to me before Xmas. Eventually when someone from Fastway contacts me I'm going to be very angry. I'm appalled by the customer service I have received. From now on I will exclusively be using Courier Guy.