Hey @KMLL! Philippe here. Welcome to the community.
Are you still unable to access your data? If so, please let us know the following so we can help you figure this out:
1. Have you tried to restart your phone?
2. Please confirm if you have a Fido or non-Fido phone? If non-Fido, have you double checked if the data settings are still on your device?
3. Did you receive any messages indicating that you've used 100% of your data?
Let us all know.