The problem is they are the one who give a 30 days window to withdraw balance of affected customer. This means that they should be active on answering emails since they only give limited window time to claim yet most of the user here reported unanswered email.
You’re right that Betnomi coming back for refund is already a miracle but my concern is why they need to have a window time on for withdrawal funds while they will take longer to analyze all the submission.
Maybe they are working on something and that's why they put a window but I do understand the others that probably still have funds on their betnomi accounts and are busy in real life and are not aware of this update from them.
The only hope that these people can have is if betnomi is going to put an extension on this 30-day window period for the withdrawal of their customers. They have to reconsider it if there are still some accounts found on their database that still have some fund on them.
I think filtering and checking them manually and giving a notice to their emails will help.