Good luck with the answer.
I would recommend only using Offline wallets, like electrum and Multibit HD like i have said before.
Just because basically, when you send the bitcoin to their service, you give them the ownership of the bitcoins you send there.
Not even their Frequently asked questions (FAQ) page is working, so i suspect that they might not answer back at all.
If you check the trust of THIS USER you will see the many negative feedbacks.