EE VDSL broadband Draytek Vigor 2850 set up

I recently moved from BT to EE for my home broadband. I had my Draytek 2850 running with BT Infinity, but can't get it running with the EE service. I've tried the Brightbox 2 that came with the service, but it doesn't seem to like my Unifi wireless - most of my devices don't get connected,...