I mistook the name of the University!

Hey!
I’ve got a little problem. Lately, I have been sending a couple of emails to the universities asking for more detailed information and, unforunately, I mistook a name of the university; I wrote “XXX” instead of “YYY” and I have no reply from them, though I sent them apology for that mistake. However, I’m quite curious wheather I should try get in touch with them once again in a week or two or I am banned on that university?
Best wishes! Thanks in advance for all replies!