The only thing you did wrong yesterday was not advertising on FB that there are problems and you are working to solve them. And of course letting us find out the nature of the problems and the extend through the media...
Tesco Mobile who are also using the same carrier as yourselves, made sure to keep posting adverts on FB that showed up on people's newsfeed regardless of them being members. You should have done the same.
There is a post in announcement,around helping out all the members who were affected by yesterdays issue,s