Worse service I ever received

I am sooo angry right now i am running a business and I was expecting my delivery from Pargo on the 3rd November as per their email till today i follow up daily no one can tell me where my parcel is ..they keep telling me their manager is gonna contact me NOT EVEN A SINGLE DAY THEY DID...I am never in my life ever gonna rely on these people for my staff i write emails ...Facebook Inboxes no one has the courage to tell me if they lost my parcel or what