How to switch the main account?
To switch your main account:
Go to MY > Verification Information > My Account tab
Uncheck the ⭐ (star) of your current main account
Click the ⭐ (star) on the account you want to set as your new primary account
To switch your main account:
Go to MY > Verification Information > My Account tab
Uncheck the ⭐ (star) of your current main account
Click the ⭐ (star) on the account you want to set as your new primary account