Just signed up for a second address..how do I log into it!?

I’ve been with you for a while at my home address. Just switched to you for a small flat I also own, and everything went through as it ought to have done…except when I now try to sign in to give you the meter readings for the flat, it just goes to the account page for my home address …
Confused as there are no other logins…what do I do!??
The outgoing supplier at the flat is now hassling me for meter readings, which you told me would all be dealt with, and if I log into their (eOn) site, my account is still active…
Oh, your phone lines aren’t working either…should I be concerned?

The simplest solution is to use a different email address for each property. Not sure Bulb can handle it any other way, at least not easily.