If you signed up for CBS All Access through a third-party (i.e. iTunes, Google Play) and you need to manage your subscription (i.e. current billing information, update your payment information, account credits, new billing date, etc.) you must contact the vendor directly. Please reference the information below for customer support specific to your device/platform:

Google Play: Call (855) 836-3987 (English), (855) 702-1123 (French), or visit https://support.google.com/googleplay/
Apple TV and iPhone/iPad: Call (800) 692-7753 (English & French), or visit https://www.apple.com/ca/contact/
Roku: Call (888) 621-0891 (English & French), or visit https://support.roku.com/contactus/contact-options