Hi Guys
Hopefully I can advise a bit here..
A Self-Exclusion is a joint commitment between yourself and the Casino. The Casino should endeavor to stop you from gambling with them, and you agree on your part not to attempt to re-open any further accounts.
Many Casinos will have systems in place that would prevent you from registering if you already have a Self-Excluded account, bear in mind the details would need to match (or at least most of them).
Regarding a refund - it would be dealt with on a case by case basis. If you have created an account using completely different details then the Casino would have not been able to detect you, therefore would be a breach on your behalf and no refund would be due (but remaining balance would be returned of course) - if the account details are the same as the original, then would be a clear issue with their system and a refund of deposits would due.