If I mistook the person I was supposed to contact, I apologize.
"もし連絡する相手を間違えていたらすみません。"
- If I mistook the person I was supposed to contact, I apologize.
- I apologize if I mistook the person I was supposed to contact.
「もし連絡する相手を間違えていたらすみません。正しい担当者をご存知であれば連絡先を教えていただけますと幸いです。」
- I apologize if I mistook the person I was supposed to contact. If you know the appropriate person to talk to concerning this matter, I would appreciate if you could tell me their contact details.