I don't think they'll get back to you...they are hiding something.
They have a similar system to Rival
and playtech. Each casino belonging to the software group (RTG) is flagged when there is a player that has charged back or deemed abusive with bonuses.
All the operators that use it will get the same info on that same player.
I have been told you have been flagged at another casino, which casino they are not sure.
As for withdrawing from Grand Parker, their sister site, they say they probably didnt have the system properly set up at the time of your withdraw and then didnt see that you had been flagged.
This is the response I received. Is it truthful? Im not sure.
Best thing is be weary, let it be and avoid these RTG brands. I cannot help any further regarding this matter.