Trigger Lock

I'm no longer getting the message saying I'm banned, but I am getting told that I have an invalid CD key. I can log in to other servers so I assume it isn't actually an issue with the key.

I was banned from the FH2 server today due to accidentally team killing a few people. I'm using an old monitor and the colour quality is poor, so it was difficult to distinguish between teams. Is the ban a temporary one only or do I need to make an appeal somewhere? Apologies if this is the incorrect forum to post such a thing, please let me know where to post if there is a dedicated ban appeal page.