Where have half the btc went from the main address? I don't see mention of it but I could verywell have missed it.
You mean the first ico? They will not move the coin to the escrow, which is fishy.
I mean from the public address in the op. Half the btc are gone!

Hi,
23.77 btc on the escrow address
https://blockchain.info/address/3JCsw5ZxyqdZqXTZa42225LakRdqgJqQck and the other btc still in our wallet, but our online wallet when we sent the coins to the escrow address they generate two outputs and sent some btc to another generated address inside our wallet, look this transaction:
https://blockchain.info/tx/08449f9ec6abbac5fc5c0df12095bda831e60c32d183716c64e5cd850fe3676b, we sent 4.67 btc to the escrow address and the wallet sent 2.07 btc to a new generated address.
We do not have problems to give temporary access to our wallet to SebastianJu so he can confirm that everything is correct if its requested by users.
By the way, we clarify this some time ago, here you can see:
Regards