Pretty straight-forward. You were banned from a server. Find a new server where they don't randomly ban people.
Also, probably worth checking out that server's website on the off chance that they did add whitelist - though I believe the message would not be a "banned" one in that instance.
Like I mentioned in the post, its my friends server and there is no whitelist. I have access to the servers logs and all the files and I was not banned that was the whole problem. I am an admin on the server as well. Was not switched to whitelist, I was not banned by anyone since it was just me and him as admin. We looked in ban file and I was not in there.
Any ideas?