Hi hurryupnplay. That can be frustrating. Sorry to hear. Can you link the game number here? I would suggest trying to talk to him about it, but it looks like you said you already tried that. Here's some options for you.
If a player is not killing you when he clearly has the game matched, then this is called "holding someone hostage" which is prohibited as stated in the Rules section,
http://www.conquerclub.com/public.php?mode=rulesIf you feel that this is occurring, then you can go here - Cheating & Abuse Reports Forum,
viewforum.php?f=5, and post your petition to have the game reviewed by a member of the C&A team.
For more subtle approach, you can always use the ticket feature here,
http://www.conquerclub.com/eticket/index.php, and make sure to use the drop down box to select Cheating & Abuse Reports.
Also, in the future they have a special forum just for questions, you can go here
viewforum.php?f=57 or you can always use live chat and ask someone in the help section. This one is generally used for posts related to strategy.
Hope that helps. I'm sure someone will be around soon to look at that game anyways, they're pretty quick! Good luck in the future.
.mk