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They don't have a 24/7 support yet. But usually, they answer in 1-2 days.
Just keep extending your session if needed and you will be fine.
Edit: On a side note, I just saw that they increased the session default time to 7 days. So you will most likely not have to extend it.
This is what probably happened:
Sorry about that. Our bitcoind got stuck. Please check again - it should be solved already.
the last time
(in January) when the same thing happened, he came to forum and fixed it in less than a day
I confirm - this is the same issue as in January. We will need to investigate this more.