Hi All,
I am not able to login into my Trailhead Account.
1. I have logged in with correct Username and Password
2.Having domain as: https://olivalightninguv-dev-ed-dev-ed.my.salesforce.com/
3. After logging in next screen is displayed as below.

4.I have deleted account from  "Salesforce Authenticator" mobile app by mistakenly.
5.But now i am trying to login into my account it's shows screen as above in snapshot. So, I need to disconnect "Salesforce Authenticator" from my Account. 

I have tryied 4 to 5 time raise request using below link
https://trailhead.salesforce.com/en/help?support=home
but still not able to raise it. 
Is any solution for this - Please let me know.