If you used the YouTube account suspension form, you did it wrong. Please go to support dot google dot com and put "Unable to access a Google product" in the search. That will show you the correct form to use, if you are unable to sign in.
Have you tried signing in to your Google Account, rather than your YouTube account? Try going into your Gmail. I believe if you can do that your account will be restored. They may wish you to take a call to receive a code to reactivate your account.