Ive been blocked out of my account, when trying to log in I received the following message: 

"You have been BLOCKED because of evil or suspicious bot behavior.
If you are a human, please let us know and we will unlock you immediately."

Well, here I am doing that, please unblock me.

I think this may have occurred while I was using the iPhone app, does this happen sometimes or do I need to be worried about someone attempting hack?