NEED HELP! Locked myself out by sshd_config file

I sort of locked myself out of a server by putting an incorrect name in the sshd_config file

I also don't have physical access to the server [We would always just ssh in] so I can't change the sshd_config file

More info: I have an Ubuntu server that I can ssh into that has another VM server on it - I need to change the sshd_config file of the VM server from the original ubuntu server..

What do I do???? HELP PLZ