听不清对方的话

I'm sorry, I can't hear you very well.

（不好意思，我听不清您的话。）

没听懂对方的意思

Sorry, I didn't quite catch that.

（不好意思，我没听清。）

I'm afraid I don't follow you.

Could you repeat it, please?

（不好意思，我没听明白，您能重复一下么？）