A few days ago, I sold some of the bitcoin funds in my wallet at Bitcoin-24.
Unfortunately the transaction happened in the middle of the period of instability of the Bitcoin-24 platform on April 1st and in the end I didn't receive any Euro's on my account for the sale, but the bitcoins are gone.

The transaction appears in my transaction history with the details of the price, the date and the amount, but I've now been waiting for days for the actual payment to arrive.

Has anyone else experienced a similar problem at that moment? Did anyone else loose all the money of a transaction on Bitcoin-24 in a period of heavy traffic?
What should I do? I contacted Bitcoin-24 using the contact form in the application, so far without result.

Any help would be greatly appreciated!