You provided no link to the exchange. I would taken some time to go through the site to see if it's really worth using. Searched for VDS or VDS exchange via Google, didn't get a straightforward answer. So, a direct link to the exchange or its other sites would help.
Their official deep web site: VDSVVVXXMXPSSSZD.ONION, don't forget to use Tor.
You may download VDS wallet from their website.
VDS is not that kind of conventional exchange, it has the build-in OTC function inside the wallet.