Is repentance and seeking forgiveness sufficient for having jumped the queue for university housing, and is it obligatory to vacate the room obtained in this manner, given that it is impossible to return the right to its rightful owners?

You are not obligated to leave the housing if you obtained it through an unintentional oversight on your part, especially since vacating the room would not restore the right to its owners, even if proven. We advise you to turn away from thinking about that incident and occupy yourself with what benefits you.