get your wires crossed
US /ɡɛt jʊər waɪərz krɔst/
UK /ɡɛt jʊər waɪərz krɔst/

1.
salah faham, tersalah maklumat
to misunderstand someone or something, especially in communication
:
•
I think we got our wires crossed because I thought you were coming tomorrow, not today.
Saya rasa kita salah faham kerana saya sangka awak datang esok, bukan hari ini.
•
It seems like we've got our wires crossed about the meeting time.
Nampaknya kita salah faham tentang masa mesyuarat.