Check your mms if its working??

If the MMS is working between fizz account, is not an APN problem

therefore, you need to contact the support

CHAT
Please contact the support

Go on this page https://fizz.ca/en/faq/resolving-issues, if you are not connect login
Wait 15 seconds for the bubble icon to appear at the bottom right of the browser and click on the icon

FACEBOOK
Your can also send a message by facebook
https://facebook.com/fizzca and click send a message (this is a bit slower)

FORM
You can also fill a contact form
From the panel My Profile -> Contact Form (the subject are limited)

For me there's a datestamp issue with other carriers, espicialy with Rogers. They are receiving them, but as if I sent them 6 hours ago. Without notification. Many people are having the SAME issue. But Fizz prefers to tell it's my contact phones who are deffective (cause it's working for some carriers with the same device). But these contacts also send/receive without any issues with all other carriers than Fizz.