is all servers hardware supported by ESXi 6.7? Check if all servers components firmware, including BIOS are up to date.
It is on baremetal - firmware up to date where possible.
Never met a company that is so unwilling to talk to a potential new cusotmer.
Just because I don't have a "number", no one would talk to me - poorest support I have ever encountered; even Microsoft beats this.
I suppose this installator behaviour is intended. It recognizes Your server as headless for some reason and You encounters this "relocating..." problem.
Read this article:
Try to follow this procedure to resolve this issue:
It's for 6.0, but the installator behaviour didn't change in 6.7