you admit your mistake with courage. even though you didn't admit it before, but making this thread and admitting your mistake, that's courage. or maybe I'm wrong, that's desperation?
From my angle I don't see any atom of courage about op admitting his offense looking at the time he waited before admitting. It's all medicine after death, which is why shuffle haven't given him the kind of response he has been seeking since he was caught about his multiple accounts offense. I mean it would have been courage he had admitted in the first instance and then stated his reasons without letting the casino to go through more trouble to dig him out.
when you created the second account you didn't read the terms and conditions? or maybe you already knew it and intentionally you wanted to get the advantage of opening a new account.
It's obvious he is aware about those terms because from the op he is an old gambler and should've known better but like he said he did that out of dissatisfaction of the limited staking amount he was placed on. And casino usually place this limits when the gambler has been recognized to be with consistent winnings.
With all the process op has gone through to redeem himself and still didn't get any positive response I'll advise he forget about it because they wouldn't want to compromise for one gambler not to set a precedent as not to encourage others to take same path in the future believing they might be forgiven too.