You have to contact agent as now only they can delete your CC info from the PM account. As of now you can only update CC info.
To contact CSA-agent, there are 2 methods:
https://www.publicmobile.ca/en/on/get-help/articles/contact-an-agent
If ticketing does not work very first time, contact agent directly.
- Send a private message to the CSA - agent by clicking Here
Watch for envelope in top right corner of Community page. It will show Number of unread emails.