Once we've activated your NBN service, it can take between 24-48 hours for the activation of your Fetch service.
The activation of the box is dependent on the closure of the NBN Broadband order. If there's something on the back-end preventing the order from flowing through to completion, this may delay the activation of your Fetch STB.
The activation code is sent via email/SMS once it's ready for use. If possible, I'd give our social media service a shot. You can message them directly over Facebook or Twitter. There's every chance that they'll be able to push the activation through from their side.