I've just bought a rider pro, it included a scala headset. The headset refused to charge or turn on. I tested the charger on a mates headset and it was fine, and my headset on his charger - still dead.
TomTom said they'd replaced the entire box, but I'd already set the rider up with my computer etc. After a bit of persuasion they agreed to send me a new bluetooth module, and didn't want the old one back.
Today I recevied a full scala pack, all of it.
Excellent customer service I'd say