おかどちがい
barking up the wrong tree; calling at the wrong house
Also written おかど違い、御門違い
Noun
お門違かどちがいですよ。
Don't put the saddle on the wrong horse.
オレを非難ひなんするのはお門違かどちがいだ。
You're at the wrong gate if you're here to criticize me.