Account creat limit reached

Hey this is my first Account on Nostalrius. Im a german student and have to use the university network even at home.
Since other students have used my IP before me, apparently I cant create any more accounts to play here.
Is there anything I could do? changing IP might not work, because it couldve been used multiple times as well since thousands of students are online in our network all the time.
Since other students have used my IP before me, apparently I cant create any more accounts to play here.
Is there anything I could do? changing IP might not work, because it couldve been used multiple times as well since thousands of students are online in our network all the time.