To begin the warranty replacement process with Rock Band 3 instruments made by Mad Catz, you can contact them directly through the support channels listed here:
North America: call Mad Catz Technical Support at 1.800.659.2287 or 1.619.683.2815; Europe: call Mad Catz Technical Support at +44-(0)1454-451900
For Online Support and User Guides: www.madcatz.com
North American telephone: Available 8 A.M. to 4 P.M. Pacific Standard Time, Monday through Friday (excluding holidays) at 1.800.659.2287 (US only) or 1.619.683.2815 (outside US).
For Europe Online Support E-mail: email@example.com
European telephone: Available 9 A.M. to 5 P.M. Greenwich Mean Time, Monday through Friday (excluding bank holidays) at +44-(0)1454-451900