Hi there Co0p,
Well, It sounds like you have been banned for Spamming, which it appears was an accident
Unfortunately to my knowledge you cannot unban yourself, and only the room owner or hosts from the #5on5.et channel can remove the ban.
However, you may be in luck as the ban might only last for 24hrs.
If the Channel you displayed the roomname in, has a website, then you could possibly visit that website and plead your case there, however all you can do is just wait out the ban
Hope this helps, unfortunately bad news.