何を言ってるんだかさっぱり聞き取れません

Sorry?

I'm sorry I don't understand.
I'm sorry I still don't understand.

Could you repeat that, please?
Would you say that again, please?
Could you repeat that slowly?
Would you say that more slowly?
Would you say that more simply?

Would you write that here?　ここに書いてみてくれます？