Each giffgaff SIM has its own separate corresponding username and giffgaff account.
To make sure you are logged into to the correct SIM you wish to manage, do the following.
From each phone, text NAME to 43430 for free and wait a few minutes for a reply. You will get the username associated with each SIM card.
- Log out: https://giffgaff.com/auth/logout
- When you log back in, input the corresponding username, or simply use the mobile number instead of the username
Then for EACH account, mange the recurring settings by following this link: : https://giffgaff.com/profile/payment-details#goodybagsettings