When someone takes the time to respond to you with details of things to look at and your response is what you sent, "it still doesn't work, fix it" is precisely the message that you are sending, whether or not you used those exact words. It's that way especially since you provided no feedback to the information and suggestions that were offered to you, and provided no new or updated information on the ongoing issues. You specifically did not say that you tried everything rotblitz suggested so no one but you had any idea what you tried and what you didn't try. How is anyone expected to provide advice in that situation? We are not mindreaders, nor do we have remote access to your computer. If you don't understand what someone says in their response just say so, and ask for additional information or instructions.
As for what rotblitz means by checking your DNS queries he provided the exact means to do so - run that command, and just as with the previous diagnostic command provide the output as text or a screenshot.
To restate what has already been said, what DNS resolvers do you have configured on your Mac? If you are configured to use any other DNS resolvers then OpenDNS will not work for you and you will get the results that you shared with us earlier. It sounds as if OpenDNS might not be configured on your router and you are relying on configurations on the Mac, which very likely were not configured for OpenDNS when you reset the computer to factory settings. If necessary go through the initial setup steps that begin at the OpenDNS homepage to make sure that you have everything configured properly.
Are you running any security products, such as Avast Security Suite 2015 with Secure DNS enabled, or any similar products with a similar option? If so you have to disable that feature in order to use OpenDNS.
Run the command that rotblitz suggested to check if your DNS queries are being redirected by your ISP or anyone else. It's unlikely that this changed at the same time as resetting the Mac, but if nothing else it's essential to check to see if that is indeed what is happening.
Try manually updating the IP address you have registered on your OpenDNS dashboard, that might or might not fix things, but it will at least tell us if things are set up and working properly on OpenDNS end of things.
