The greed and panic hoarding should cycle to civility soon and a bunch of retards will realize that they bought years worth of supplies they don't need, and will probably feel quite ashamed about depriving people that are actually at risk. And no, you won't be getting a refund, go fuck yourself.
If this were to continue though... the supply chain will be overwhelmed. The machine is lean and mean, and not setup for something like this. Normally during a natural disaster this sort of thing happens but goods and resources can be redirected from unaffected areas. This is panic buying on a global scale, something we have not had to deal with before really.