For the previous international SMS service (which was also in beta, though admittedly, not very clearly denoted as such) we notified those that we believed would be impacted by the change. I'm sorry that you did not receive a notification. That should not have happened that way.

Every customer, regardless of volume, is important to us. We're opening up the intl SMS beta to more and more customers every day. I'm happy to try to work something out with you. If we can't get you up and running, I'll refund your $20. Email me: jsheehan@twilio.com