That does not make much sense to me actually. You say it was a voluntary ban? And yet, you received a letter to that effect? But you don't know or remember what that letter said, because you threw it out?
>My ex-husband told me I had to or he would leave me.
Since he is now being called "ex", I take it, he left you anyway?
And they happened not to recognize you when you returned to this casino, and "noone threw you out" so that indicated to you, that the ban must be over?