this is not the equivalent thing ... this is not an infectious disease, where I do believe that Disney would have the legal obligation to contact people, unless the CDC (center for disease control) took lead agency on it and requested a passenger list and started contacting people. And it is not a "life or death" situation that has to be resolved on a tight deadline or there will be dire consequences such as loss of life or limb... it it is not an irreversible medical thing, it is a paperwork snafu with an appeals process to get it resolved. Disney was not in power to make this go away for you once the government agency had the wrong information, all you can do at that point is correct it through the established protocol of that agency who thankfully has an appeals process. If you really think that Disney could have just made a phone call and cleared this up before you overstayed your visa, you have not been following the immigration situation here in the USA. It is a very very dire situation for very many people and the whole agency is completely, utterly overloaded... that is without making any political commentary, it is a fact that we do not have enough personnel to process everything that needs to be processed. Unfortunately once the mistake had been made, you are stuck in the bureaucratic process of getting it fixed and that is not something that Disney, big and powerful as they are, is in power to do for you. They should absolutely without any question provide whatever documentation is required of the agency (and regardless of whether you think it is good enough, as long as the agency accepts it as proof what does that matter?) and it sounds like they did that?
It's not a life or death situation, it's a paperwork snafu with an established appeal protocol through the agency that is responsible for keeping the records. I understand that it is unnerving and you will be anxious about it until it is resolved especially given the current immigration situation here in the USA and I even understand the anxiety that even though you did everything above board, you still may end up facing consequences for something that is not your fault... life is not very fair here in the USA for many people and things don't always turn out the way they should. Believe me, I understand that and I understand your frustration. But you seem to think that Disney could have solved this all for you easily if they had just acted quickly on it and I am telling you that after being involved in bureaucratic paperwork snafus myself that this is not generally the way it works. Things take time to go through the system, deadlines are missed and then appeals must be made and it's all a big stressful pain in the butt. I'm just not sure it is Disney's fault either, as they are claiming they handled all of the paperwork properly on their end. You may never know if they did or didn't but there's nothing more you can do but take them at face value that the mess up happened further down the line with powers that Disney has zero influence over.