Packsify does not keep a permanent link to your game account. We access it only during an active order, then sign out and remove the account from the device.
If you want to change the login method bound to your game, for example switching from Google to Facebook, that has to be done in the game's own settings or through the game's support, since we cannot change game binds.
To check what is still connected on the platform side, see How do I check which devices are connected to my account.