Parcels gone missing

I have 3 packages gone missing, nobody is trying to help me, tried to phone, the person I need to speak with is not answering, and not even responding to any email properly. Customers are waiting for the parcels and is now reflecting bad on my business. During the co**** of a week, nobody seems to do anything and does not care that there are parcels missing. I just get copied into one email to the other involving other people, still nothing gets done! Sorry Courier Guy, you have disappointed me with your bad service!