Deactivated internet on weekend

My plan was deactivated on Saturday because of late payment. I paid the plan by updating my CC info.
I got a text saying my plan was reactivated.
However my modem tower still wont connect to the internet.
What's the problem and how do I troubleshoot it further.
None of the troubleshooting worked so far (resetting modem, unplugging electricity etc)

Answers

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