This post is not to recover my coins, (although I would like that), but to see the possibility that the sites begin to block not only the accounts, but also the IPs from which those accounts were connected.
That would be crazy if you think this way. You lose the amount all by yourself and now you are hoping that they will recover it? They don't force you to play again but it was you that requested it. How sure you are that the time for your self exclusion is already over? Because, why they won't return your primary account? It is fine if they will block the newly created account as long as the given sessions are done, that is to prevent you from becoming an addicted gambler.
Primedice is doing a good job there, they are strictly following their self exclusion system but if you really want to, there are still other gambling sites that you can play apart from primedice.