Gb used vs GB shown used?

Hello Cory,
I am sorry to hear about this situation.
You can verify your daily usage from your Fizz account, My plans > details > daily usage.
I recommend verifying this from an incognito browser.
Here you can find more information about this: https://fizz.ca/en/faq/how-do-i-view-my-usage
In case the information you see there does not match the one from your phone please reach our support team for further investigations: https://fizz.ca/en/contact-us
Have a lovely day,
Alex