If Sessionwire won't let you use the new address, there's probably already an account with that email. That often happens when someone signed up once with a work address and once with a personal one, or once with Google and once with an email and password. Email support@sessionwire.com and we'll sort it out.
Your billing email for receipts is separate. You can change it in the Customer Portal under Billing information.
It's easy to end up with two accounts, especially if you joined someone else's Session as a Guest and signed up from there. Signs that this has happened:
Sign out and sign back in with the email address your receipts go to. That's the account your membership is on.
We can't combine two accounts into one. Keep the account your membership is on and remove the other one:
If you've been charged on both accounts, email us about a refund (see Refunds). If you'd rather we remove the extra account for you, email support@sessionwire.com from the address you want to keep.
Try the addresses you use most often, including any work address, and look for receipt emails from your first payment. If you're still stuck, email us with the addresses you think it could be. For privacy we can't tell you which email an account uses, but we can help you narrow it down.