HitBtc exchange is a very shady exchange there have been many accusations about this exchange you should be aware of it.

You can see from searching about Hitbtc on this board : https://bitcointalk.org/index.php?action=search2

So in your case, you make a deposit and then Hitbtc asks for the source of the transaction until it's gone through with the documents and Skype is still on hold?
How much money do you think was robbed?