Try private messaging him through Instagram. Any avenue right? Couldn't hurt...
Edit: Better idea, lets ALL private message him through a single avenue and see if we can elicit a response...
Sent off some instagram ones too now, thanks for the suggestion. So I've done 2 instagrams, 2 new tweets, and a youtube DM today, hoping for the best
Also just a little timeline for everyone:
2014:
20th January - Amazon Payment to Fontaine Finesses was successful
23rd March - Pledge Confirmation via Backerkit survey - postage address and pledge type confirmed
25th May - Production of cards finished.
12th June - 350 of around 1100 orders shipped
5th September - all parcels shipped out
Since the 9th of October I've attempted to get into contact with Zach via Twitter, Youtube, email, Amazon Payments and now, Instagram.
Still remaining optimistic.
Just to further add: I get that the logistical operation of shipping out over 1000 parcels would have been quite the nightmare, and it's very likely that it was forgotten amongst it all. I'm just hoping that Zach can be mature enough to respond to my concerns and a resolution can be sorted