Lost all access to vps after install

[Median]

Hi.

Hoping someone can help. I successfully installed ISPConfig on my vps and was able to log in and set up a resller account for myself successfully. Something happened (I have no idea what) and I lost connection.

Since then I have been unable to access my vps by domain name or ip address by any means - I have tried http, ftp, sftp and ssh all without success.

I can still access the main vps control panel and put the vps into repair mode and if I do so I can then access the server via ssh. Rebooting then causes everything to be inaccessible again.

Anyone help at all please? Thanks in advance