UPDATE: Vitacost did ship my order, finally, after my request to cancel it altogether. The message explained that there is customarily a "hold" placed on the credit card that does not reflect the order total; in this case, they charged me the higher amount anyway, then issued the discount (NOT the way a hold works). Sketchy business practices.
Good luck getting email or chat to connect. I phoned, and the agent was pleasant but completely unequipped to execute corrections to the order, or to make anything right, really.
1. Promised discount showed up in my cart when I placed the order, but was not reflected in my credit card charge.
2. No way to communicate the issue except by phone, which didn't fix anything.
3. There is now no record of my order at all in my account. No order, no shipment, no tracking. Only the charge on my card.
ETA: You can try their email at *******@vitacost.com, because their website form does not connect. I did get an automated response.