How Can I Change My Email Address for Booking at the Laos Embassy?

i don't know if this has been asked trying to book an appointment at loas embassy for next week. however to log into the account to book the appointment I can log in, however I wish to change the email address, so I can receive the confirmation of the booking, to my new email address, has no option to do this? tried calling the loas embassy no answer there seems to be a number in Bangkok but never gets answered, and if I try to register a new account it locks me out for 24 hours, so any ideas and I'm not on a block or suspension with the previous account I just cant access the old email, anymore. hope this makes sense what I'm asking for advice for?