Today Fuji finally acknowledged there's a problem with their online claim application software. Taken them a while to see what was in front of their noses but it's a step in the right direction nevertheless:
Unfortunately we are experiencing unexpected problems with the claim form for Fujifilm Battery Grip Promotion.
The issue will be shortly resolved.Please try again within several working days.
Please accept our sincere apologies for any inconvenience caused.
If you have any queries, please contact our customer service team at: fujifilm@promotion-support.com
Kind regards,
Miglena Antonova
Fujifilm