Needing a little help with Youtube

So I have an old partnered youtube that I used for gaming. It's linked to my google+

I want to change the name of the original but I have no idea how to do it.

I've change the google plus name and I've done a custom url but it still didn't change the old account.

So far my youtube is this (after changing custom URL. I though it would also change the oldone)

https://www.youtube.com/c/OnlinedimesFrank

When you go to the youtube it looks like this http://gyazo.com/1debc34b3093a0c6fae30eb5a24b3905

Now if you click on the minivansteve username it goes back to the old account youtube.com/user/MiniVanSteve.

Here is a picture that explains it. http://gyazo.com/cecfb31051c9af059c65051b7dbc734b I'm wanting to change the top url

Super damn annoying since Minivansteve isn't my real name it was the name of my old gaming youtube. When google plus was launched I lost all my subs and just left the account. I had no idea it would be this difficult to change the name of the old account.

as you can see from the picture below my youtube and google plus names are not the same.
http://gyazo.com/06bf22e6a17cbd599830693686801e13

Is the only way around this to start another account?

 

Here is a link to a tutorial about what you need http://mediafreshpress.com/change-your-youtube-channel-url/
hope it helps!

 

Thanks but don;t think you understand what I mean I;ve already done that. Anyhow just found out from youtube I can't change it so doesn;t matter now