Just because he was playing doesn't mean he was paying attention to you, nor is it his obligation to. You tried to break the rules, you just failed due to something newly implemented. I don't think this is admin abuse because as far as the admin knew he was correct and was acting in good faith, and this change is very new. It would be similar to when !give was changed on GG, if you typed it and nothing happened the admin could still think it did ad punish you.

What would have helped is if the admin verbally confronted you first, then maybe it could have been worked out, but it's not that big of a deal as the admin wasn't just being a cunt, but rather uninformed.