First, here's a general bit of advice. When trying to interpret a Japanese sentence, begin with the assumption that the sentence actually has some logical meaning.
Does "The users who do not follow the staff's instructions go back" make sense to you? If you saw that on a sign, would that mean anything to you? It doesn't make sense to me, which generally is a good sign that you've got something wrong. Japanese grammar and sentence structure are very different from English, but the actual content of what people actually talk about isn't wildly different or alien. So if your interpretation of a sentence feels like unclear, vague gobbledygook, try thinking about it in a different way. I can tell you that this sentence is expressing a very common and logical concept.
Returning to this example, here are a few things you're missing here:
- the nuance of 従っていただけない and お帰りいただく (unless you're intentionally excluding this)
- the nuance of 場合がございます (which I explained above)
- the specific meaning of 帰る in this context (in the context of a restaurant or facility, this would mean to leave, i.e. go home)
If you still feel confused, let me know and I'll give you the "answer" in hopes that it helps you puzzle things out.