In order to change your E-mail, please follow the steps bellow:
Log in to your Viva Wallet Account.
Select Settings and Profile.
In Business Account Contact Details, select Primary E-mail and write your new E-mail into the field.
Save your change, by selecting the green symbol.
At this point, you will receive a notification E-mail containing a link to your new E-mail address, which you will need to click on in order to confirm the address.
By following the same process, you can modify the System Notification E-mail if you wish.
If you use the same E-mail address in another business account, the E-mail will change there too.