SC2 stuck on remote pairing

Any ideas what you do when the helmet just keeps bleeping at you after saying "remote control pairing" with the SC2 flashing white (blue / purple)? Manuals just state that the SC2 and remote come paired together and don't offer anything more.
On a related note, is there any support from Sena for new equipment? I got the C5 and SC2 at the beginning of the year and never had it working. Dealer has been great but has same problem with lack of support so we've tried to muddle through. I don't know if I have a broken one which would be fine if somebody could tell me that. I even waited for a firmware release which I now have but comms are still down. HELP!!