Unfortunately, there's no way to guarantee a swift moderation process. The GM team has to deal with a lot, and how fast they can deal with anything you report to them will depend on their current case load as well as the due diligence they need to perform to ensure that they are genuinely taking action against people who warrant it. So unfortunately, the reporting process is probably not going to be something you can rely on to deal with issues like this in a timely manner.
The horrible names probably gives you a leg up in the reporting process. If the names violate the ToS, that alone could be enough to invite GM action, so this may be worth reporting.
In addition, don't be dissuaded by folks who say that just standing in a place isn't breaking the ToS, because it is against the ToS to harass people; that's why GM's exist, because they're humans who are capable of understanding the nuances of human behavior. If people are harassing you, make a report of it will all the details; in this case, it seems like what the players are doing is pretty transparent and the GM's will have no problem identifying it as harassment.
It's also possible that if this keeps happening and you keep reporting it that a GM may be able to take a more proactive approach; for example, it would be pretty easy for a GM who understood your situation to just keep watch for a few hours and instantly ban characters that raced through character and straight to your house. I'm not sure if they would do that, or what it would take to get things to that point, but I don't think it's outside the realm of possibility. So I encourage you to not lose hope and to keep using the report tools. If GM's intervene at a high enough level, it likely won't be worth the trolls' time to keep it up.
In addition, make sure that you, your friends, and the other customers don't feed the trolls. Don't complain about them or insult them in /say, /yell, or /shout; just entirely ignore them. Don't do anything that would only temporarily kick them out of the house if it's possible they could walk back in. The trolls are there because they want to make you suffer and get a reaction out of you, and if you don't give that to them they'll get bored. It may take days or weeks for them to get bored, but eventually they will.
In short, keep reporting them, and try your best to have fun while pretending they're not there. In time it will be solved. I know that's a less than ideal solution, but stay strong!