Am I being too picky?

This is quite a weird story and I really don’t know what to think of it. Let’s start with the beginning. I just moved flat two days ago. I now live with a maybe 35 years old Spanish woman in this flat I was talking about some days ago. When I moved in, one of the first things I did was testing internet. But it did not work with the password she gave me. Never mind, I left for a weekend and thought that this would work out. Hoping to get internet as soon as possible as I am, you could actually say, addicted or rather dependent on internet. I need it for working for university and AIESEC, to communicate with my friends and family, to get information and to have some divertissement. Anyways, when I came home tonight, quite tired (as my classes lasted until 9.30 PM) and a little sick my flatmate asked me again if it worked now the internet. I tried it once (rather 100 times) again and it still did not work as my computer told me the password is invalid. She then called the company and was talking with them for 20 minutes. I did not understand everything they were talking about, but basically the outcome was that this very password worked for the person that was here before and if it did not for me then this is kind of my problem. They told me that this company usually has problems with Mac and that this is just the way it is. Which is a very good explanation for someone that spells wireless wrong when writing down things, which they told her on the phone. Anyways. I called Juan from the Spanish MC who really knows about computers. He offered me that I should send him the data of the router and that that he would try to find out some stuff. So far so good. Now came the point that irritated me. I told her and asked to note me down the data of the router. But she refused for security reasons and told me things like the password are only for her and me and for no one else. Wow, how nice is that, shows that she really trusts me. But I could not say much, was just speechless and being a little sick did not help me finding the good answer for this. I then took the paper with me that had my notes I made during the phone call, which had also her notes including her IP number or something like that. When I was than in my bed reading a bit, she came to ask me for the sheet so I thought that she wanted to copy something or anything like that. But no, she actually RIPPED OFF the part where she wrote things on and gave me back the part with my notes. Now I really don’t know what to think about this. I really think that she is very rude and I am really pissed of this. It’s not about the internet anymore but I can really not accept this kind of treatment. Or am I now unfair? Am I just being very picky on small things or am I kind of right? What should I do? What would you do in my place?