why my internet stops working in the past three days?

It's seem to me Fizz has problem with internet since about 3 days.

Try the solution in these link before contacting the support
https://fizz.ca/en/faq/my-modem-connected-cable-my-connection-keeps-cutting-out-how-do-i-fix
And
https://fizz.ca/en/faq/my-wi-fi-network-cutting-how-do-i-fix-it

CHAT
Go to this page  https://fizz.ca/en/contact-us, if you are not connect login
The business hours: every day from 8 a.m. to 9 p.m. (EST).
Wait 5 seconds for the bubble icon to appear at the bottom right of the browser and click on the icon to chat with support. Try a different browser if you have issues getting the bubble to appear.
If the chat bubble does not appear, this means that the number of sessions waiting for our answers surpasses our processing capacity. If that happens, send us a private message via Facebook Messenger or Twitter.
 
FACEBOOK
Your can also send a message via facebook messanger https://facebook.com/fizzca and click send a message (this is a bit slower)
 P
CONTACT FORM
You can also fill a contact form from your account Once logged in, from the account panel go to My Profile → Contact Form (the subject are limited) and fill out the form and someone will email you back.