The only thing you can really do is report it to Helpspot. Yes, it takes a while for your ticket to be processed, but eventually, you should have something done.
In addition, I would try using the in-game report option as well, just for kicks. There is nothing that can be done about a player that is botting until Evony knows 100% that they are. Keep in mind, also, how many other bots there are out there, on all servers, with new ones cropping up each day.

Finally, unless I am mistaken, Evony is currently running operation Cerberus, which entails the removal of cheaters and bots. I may be wrong though.