Record a demo and take screenshots. Much better than posting names of people because you have solid evidence of thier actions and they can't asspull innocence. And confuse people who are admining.
Yo, recruit some Americans if you need somebody to cover that time-slot of the day. I can't help you physically but I can ask around if people have free time during that.
It helps having an objective view on the situation so you can better understand your community and be able to provide a better service to them. Having respect from your user base can make you go very far.
You are welcome, and I more than happy to assist you or other people in the future on ethical practices and procedures on running a server. I managed a source mod server for about 6 years and I am happy to provide advice and input. Being an admin is not an easy job and can be very stressful.
And you handled that situation wrong. I described 3 other methods you can use in the future if you must enforce that rule that is not as severe as temp bans. They will work and make people happier in the end. It will certainly stop me from complaining to the person who owns, hosts, and pays for...