Does son have his own account ? He needs his own account as there's no family plans here at PM. He needs a separate sim and unique email address...you can use the same credit card for payment though.
Are you using a laptop to access his account ?
Make sure you're using correct username (email address) and password for his account.
Please log in using incognito mode. I'm using Firefox and seems to be working fine.
My son taking over my old phone I upgraded mine so was just trying change the plan for him to just calling and texting so selected the 15 dollar plan but says ops something went wrong every time
Try logging in using incognito mode.
Try waiting for 1/2 hour...then retry.
cheapest currently is the $15 plan with 100 outgoing Cdn minutes, unlimited incoming minutes and unlimited text. 250mb's data also included. With the recent Holiday free 500 minutes of International calling (including to Canada)...the $15 plan should be good.