Besides https://fizz.ca/en/contact-us , there are:
1) Email[email protected]2) Chat (7 am to 10 pm | Week-end 10 am to 6 pm) Login your account. Click on “Help”. In “Popular topics” click on any subject. Scroll down to the bottom. In the right corner the chat bubble will appear after 15 seconds. Click on the bubble and type your question. You will see what position you are in the queue. Sometimes, it can be very long before you can chat with someone: one hour, 90 minutes…3) Facebook Messengerhttps://www.messenger.com/t/fizzcahttps://www.facebook.com/fizzca/4) Contact form Login your account; My profile--->Contact forms--->Submit a complaint
personally, I recommend to use the contact form on your "My Profile" page.
At least it automatically opens a ticket in the system.
Make sure to be explicit as much as possible about your issues. Otherwise you'll end up in a wild goose chase, exchanging e-mails for ever, trying to get the right answer.