They won't back today. Already they replied to one fb users that they will back on Tuesday EOD.
In next few days I think even if we have access they might block withdraw or send btc option for further few days. Because they might say due to huge withdraw request/send request all service may take more time than normal. Such a poor support and service.
Time to switch other.
Here is the reply in their FB to user.

"Unocoin Dear Customers, We regret to inform you that we are required to suspend all our services due to some unplanned maintenance activities of our website and our toll-free line. While we are working round the clock to resolve the issues and be back online by tuesday EOD, we would like to highlight that your BTC and INR balance is fully safe with us. We appreciate your patience in this regard while we work through this unexpected outage."