@SandiR
If two (or more) people use the same browser on the same phone (or same computer) to login to Self-Serve, then you'll have to logout, clear cache, clear cookies, close/restart the browser, login again each time you switch users.
One solution is to download and install a second browser for the second Self-Serve account. Another is to use separate machines (separate phones, separate computers, separate user profiles in operating system) for each account.
Self-Serve is basically designed with the assumption a single user has a single account. (And, increasingly, the assumption that each user has their own smartphone with thei Public Mobile app.)
If you've both submitted the same email address and/or credit card to pay for your separate accounts then the kludgy system might have stumbled onto a bug and halted one account. Public Mobile (Telus EverSafe) also assumes each unique subscriber has a unique email account and unique credit card they can bill.
