I don't have much experience in renting so would appreciate opinions as to what is reasonable in this situation. I'm currently a student living in halls of residence. This morning when I woke up I found that the door knob on the outer side of the door to my room is broken. It just keeps spinning rather than opening the door iyswim. The one on the inside works so I can lock the door when I'm inside but I can't shut the door if I go out because I won't be able to get back in.
I reported this to the front desk of the building this morning but was told that as their are no maintenance people working at the weekend there's nothing that can be done until Monday. I'm not very happy about this because it means that if I leave my room either to go out somewhere or just to use the kitchen etc it will have to be left ajar and I will just have to hope it doesn't slip shut, and that nobody just walks in and nicks my stuff. I'm not sure what their answer would be if the door did shut when I was outside 
What is a reasonable time for this to be fixed? AIBU to think that I shouldn't be expected to leave my door open until Monday? Also, if anyone could tell me how I could fix it I'd be very grateful.