There is no doubt that cheating has occured and probably will again. Gaming would not have taken you to the table for the check. No one would have known you called unless you told them.
There is a lot of cases of cheating between dealers and their agents. It is seldom that they get away with it for very long. The cameras are very good today. I am aware of only one case of the house cheating since 1980. It was a slot route owner. They lost their license. I am not saying it was the only case since then, but the only one I am aware of. Most scams today is slot cheating by customers or dealers with agents.