您好像打错电话了。
I'm afraid you have the wrong number. *wrong“错的”、“不对的”，wrong number“错的电话号码”。
I'm afraid you have the wrong number. (您可能打错电话了。)
Oh, sorry for troubling you. (哦，对不起，打扰您了。)
I'm sorry, you've got the wrong number.
您拨的电话号码是多少?
What number are you calling?
What number are you trying to reach?
