Pro-tip

If you are calling a large bureaucracy (say, a hospital) and having a lot of trouble reaching the person who can help you, and the person you are currently talking to asks you "What number did you call?" they are very likely trying to diagnose the problem. It is possible that they simply want to diss you for calling the wrong number, but not all that likely. Refusing to answer the question and being obstreperous about getting the runaround from everyone you talk to is likely to get you more runaround. In general, if people are trying to get rid of you, they won't bother asking you questions; they'll lecture you and hang up, or transfer you. If they actually try to engage with you, and ask you a series of questions about your previous experiences getting shunted from one unhelpful person to the other, they aren't making fun of you. They're trying to retrace your path so that they can figure out what you actually need. Being unable to distinguish between a sleep consultation and a sleep study, or a sleep clinic and a sleep lab will cause some confusion, and the person trying to help you will likely try to clarify the difference. This is not an attempt to tell you you're wrong, it's an attempt to figure out what the heck is going on.

tl;dr: Just work with me, ok? You were the one who called me.