There is no reason she would ban you. It could have been that you were tied with someone else, or she couldn't see it.
If you had spun a high number and she didn't see it, I can see not wanting to take the chance on getting a lower number, then other people in the room should back you up. I have seen that happen before, where the host didn't see but everyone in the room said the person in question got "fix" or "ive".
If she doesn't accept that then you just have to take the chance and spin again and trust that it is what the universe wanted.
Don't stop playing, you just have to do what everyone else does that wins a host game, spend many hours standing in the queue. It is the only way.
Sometimes I win, sometimes I lose, most of the time I dc, but I will never win if I don't try. In the past I have got 3 infernos and dozens of staff pins.
The hateful thing to me is tried for hours and days and never even getting in the room once or dc just as it is my turn. That really upsets me on the times when it is a "weekend only event". For weekend only event they should have more then one room once at a time.
Dianne