@MMcKay1 - once you get access to your account you can...
Report lost / stolen: https://www.publicmobile.ca/en/on/get-help/articles/lost-or-stolen-phone
and, once you obtain a new SIM card and phone, see "How To Change Your SIM Card" in this Help Article: https://www.publicmobile.ca/en/on/get-help/articles/change-sim-number
@MMcKay1 If you're talking about 2FA, click resend code and select email instead. If you can't remember the email you used to create the account you should contact CS Agent to help you get access to your account and mark the phone stolen. Contact them here,