Lost package of shiny in the mail.... anyone????

Looks like I'm dealing with my first lost package of shiny in the mail. I'm not going to name the company unless I get death threats from you all, but they have assured me that if it doesn't shot up after 30 days from ship date that their insurance will cover everything and they will reship. I have ordered from this company at least two dozen times and never a problem. If anything, it arrives before they say it will... This time, some low-life USPS worker evidently is stacking. So, has anyone ever had to file a claim for a substantial order and get it properly filled? I'm not super happy about this, as you'd expect.