Naming and shaming is not allowed on these forums. Regardless of whether you actually faced a cheater or whether you missed something, you should edit your post and remove the name of your opponent.
I recommend that you start playing with an addon that records all game actions to hsreplay.net. Then if this happens again you can (1) review the game yourself to verify whether you really missed nothing; and (2) provide that link as evidence when you report the incident.
Since calling out user names is against the rules of this forum, the best place to report a cheater is probably to email the address (including the hsreplay.net link in your report) mentioned here:
On the other hand, if you prefer to have others look at it first and verify that you didn’t overlook anything, then the New Player Tavern forum is probably the best place; this forum should be reserved for bug reports only. (Despite the name, the New Player Tavern is not only for new players, but it is a forum where people ask their questions about games, strategy, and rules - and get answers).