Once ICO ends, SCAVO developers will distribute the tokens to your wallet, the one you have setted up in your dashboard. The wallet must be an ERC20 compatible. About exchanges. Scavo are listed on CCore and Raisex exchanges. Trading will start immediatelly after ICO ends, after token distribution to be more precise.
Raisex.io Exchange is a SCAM SCAM SCAM
Do not trade with them. For Proof see: https://bitcointalksearch.org/topic/m.47215123
Not only is Raisex run by a KNOWN scammer but also has fake volume posted to attract a community like you. The Scammer thinks you are all silly that you cannot add and see their fake volume.
Salvatore Castagna is a known scammer and has used Listex.io Exchange to do the same thing.
You may be able to withdraw your coins now but tomorrow is another day. Please don't fall for it and don't take my word for it. Go and check it out yourself.