Still waiting to hear back after May 1st

I applied to an international school that is rolling admissions. I haven’t heard back yet and I’m running out of time. I have already been accepted into my second choice school but feel like I can’t fully commit until I have a decision from the other college. I have already submitted my tuition deposit and the next one will be for housing. I don’t want to screw up my chances with this school, so what should I do? Is there a way to contact the school to see if they have a ETA? Advice please!