@StanEvans -- it can be done through the My Shaw Portal.
I can see where I am supposed to be able to change the expiry date but the website will not let me change it
@juliamdube -- I just typed the four new MMYY digits at the start of the field, "overtyping" what was already there. Is that what you tried to do?
omg Thank you... I've been trying to delete the boxes, and it wouldn't work. I feel like a nut. Again, thank you for your help.
@Elmj30 -- it won't let me enter the code
Hmm. It works for me (Windows 10, using Microsoft Edge web-browser).
What error-message do you get when you try? What happens?