Support inquiries should generally be directed to support@cohtitan.com. Looking at the site, I see that we do not have that listed anywhere so I apologize. I'll add that to my list of things to fix.
Looking at the Nitekilla account, I do not see any problems that should prevent you from resetting your password. The only possible issue I can think of is maybe if you're copy-and-pasting the password, it might be picking up extra whitespace which could cause a problem. If you've been copy-and-pasting, try typing it in manually. The reset passwords are case sensitive and should not contain any whitespace.
If that doesn't work, please forward the most recent reset email to sekoia@cohtitan.com and I'll look into it further.