How to delete a domain, or become a controller of an unfinished domain created in an existing forest?

Question

System administration

All servers are Windows 2008r2 Standard. Created a new domain tree (root) in an existing forest. Successfully passed all the stages of creation, and at the longest stage, bam the RPC server is unavailable, and that's it, the operation is interrupted.
I looked, DNS was installed, I repeated the procedure for creating a domain, it says the name is already taken. I tried to become a controller in an existing domain, I can’t either, my controller is tobish, does not respond)). And that's it, I can't do anything else. Poryskav on the Internet and did not find a description of the removal of the domain (domain tree). The domain name is a pity, and I don't want to make a mess. Can someone tell me what can be done in this situation, I will be grateful!

Answer 1

https://www.google.com/search?q=%D0%BA%D0%B0%D0%BA...
what's the problem? full of instructions.