Your DNS queries do not go to OpenDNS as expressed by the welcome page. Therefore there's nothing to be logged by OpenDNS.
You correct the configuration of the OpenDNS resolver addresses wherever you have configured them. To ensure your ISP does not redirect your DNS traffic, you can execute the command
nslookup -type=txt which.opendns.com. 208.67.220.220
If this returns "I am not an OpenDNS resolver", then your DNS traffic is redirected, and you cannot easily use a 3rd party DNS service like OpenDNS.