Well after 2 days of waiting, I got the following message:
sorry for so long waiting. Your request is sent to technical department and will be soon investigated. We will try to do this as soon as possible. When your issue will be resolved, you will receive notification by email.
That was 2 days ago, so after 4 days, still no news about the 5.4 ETH I sent using their service. I found very upsetting to have such a poor support whereas significant amount of money. I was very excited using Bitshares as a technology and am now wondering what I have done here .. Is it only me or this should be expected ?