ALL gear companies are swamped. Gear makers are particularly swamped. Only Blackhawk has really been able to keep up with the op tempo for gear, but when you have huge factories, it's expected. That said, they STILL have stuff out of stock on backordered until sometime between Nov to Feb.
As a gear vendor, i do my best to get back with customers in a few days if I am running behind. However, I sometimes overlook an email or two (ask Raith...heheheh). So...if you're worried...there is this neat invention, that has buttons and stuff that allows for comms over long distances.
IOW, pick up the phone and call them.
I am just as guilty as relying on email for my comms, but you CANNOT if you need certainty. There is still not enough COMPLETE reliability to know for certain that a message has arrived.
"Doverai no proverai"
Trust, but verify.