Hi there, the simulated images in my old guide are outdated and they longer have a banner on the locked Competitive Play option if you are permanently banned. Apologies for the confusion.
Remember disconnections can happen for a wide variety of reasons including those that don’t disconnect your computer from your overall internet connection. If you are disconnecting frequently specifically from Overwatch, you need to troubleshoot your connection route by running connection tests such as a WinMTR test.
As always, suspension and bans from specifically Competitive Play are absolute and cannot be appealed. See this official Blizzard post for more details on this policy: