T-Gateway Out of Stock??

I'm having the NBN Contractor attend tomorrow to install the connection box in my home (FTTP). Exciting right?
Except I'm still waiting on my T-Gateway to be delivered, and I have been told tonight the warehouse is out of stock and Telstra can't tell me when they will be available again.  

I'm worried my ADSL and phone line will be switched off tomorrow and I'll be without internet or phone.. or NBN!