How do i contact radiant customer service? Toll Free: 1-877-612-4400. If you’d like to make a payment or change payment information on your Radiant account, please contact our Customer Service at 604-257-0500 or 1-877-612-4400 (Toll Free).How do i make a payment on my radiant broadband account? If you’d like to make a payment or change payment information on your Radiant account, please contact our Customer Service at 604-257-0500 or 1-877-612-4400 (Toll Free). Moving Locations? Moving offices and need to move your Radiant Broadband service?Do i need to give consent to radian group inc? You are not required to give consent as a condition of getting any services from Radian Group Inc. Rashi Iyer Phone: 215.231.1167 Let's Connect! Sign-up to receive the latest Radian news and content.