Plan Issues

Hi,

I'm a highschool student and my art teacher bought a plan for me last year. The plan didn't include Lightroom, so when I recently got a Mac for Christmas I decided it was time to buy it. I bought the yearly option and payed $120. When the page refreshed it was as if I had never bought it and it still gave me the option to "Try" or "Buy Now". I thought maybe it didn't go through, but when I checked my bank account the money was gone. The art teacher that bought my plan quit, so I can't contact her. Whenever I click on Lightroom it says I need to request permission from my "administrator"? I'm guessing that's IT, but my school isn't helpful in that area (I've had issues before I had to resolve by myself). If I get permission from this administrator will lightroom work on my desktop? I mean the fact is my money is gone and the app isn't working. I don't want to cancel my school plan from last year, because I still use it. I just want lightroom for desktop and my $120 not wasted. I swear by adobe and have been editing with it for years, please help me.