When to File for Loss or Damage
File claims as follows:
a. For damaged or missing contents, a customer should file a claim immediately, but must file no later than 60 days from the date of mailing.
b. For a lost article, a customer must file a claim within the time limits in the chart below.
Your item counts as damaged or missing contents. The 21 days is for lost items, the intent being that the item may show up during that time. Your item has arrived destroyed, so go to the nearest post office ASAP and file your claim. You do need to present the item, packaging and packing materials as proof, but do it soon because on Wednesday the post offices will be slammed with other claimants. Good luck!