@jimbrosburrito
Are you having an issue with the page "saving" the Sim card change? Log out and reboot your device. Clear your browser and log in using secret/incognito mode. Make sure you have 2FA enabled on your profile page. Attempt the Sim card change again and save. Regardless of the outcome disable 2FA again before you log out if you prefer to not go thru that PITA procedure every time you log in. If you could not save the Sim card swap again then contact customer support to perform the Sim swap for you.
I have had this issue....I recommend a private message explaining in detail the issue and include the pre-verifiers of your account. Include the new Sim card # in your message and ask for the CSA to send you the extra verification questions. The list contained in the spoiler of the linked post below will give you an idea of what you could be asked. To be prepared and cut down on back and forth response times have your account # and payment info handy as at least one of them will be one of the verification questions.
https://productioncommunity.publicmobile.ca/t5/Get-Support/Get-Support-Contact-Customer-Support/td-p...
