Problems with my mailbox

OMG!
I really have a big problem. I wanna cry!!!
I really hope you can help me just the same way you have always done.
Today in the morning my students spent a lot of time doing a couple of exercises which were supposed to be delivered to my mailbox.
Right now that I´m checking it, it only has ONE result from 28 students who took 2 assignments. I was supposed to have 56 answers, and I only have that one.
I´ve refreshed it several times, but I haven't been able to see anything.
Please, tell me what to do, as it was a special day and I cannot bring those students back to the same classroom again.

Thanks in advance!