You got it completely wrong.
The client will think you're...
You didn't tell me about this change. How was I supposed to know?
Why did you do this?
Do this right now.
You've misunderstood.
How did you come up with that amount?
As I told you....
I don’t recall any mention of this. May I suggest we get together to sort out how we’re going to deal with this?
Following my email (below)
Maybe I didn't make myself clear.
We'll need to revisit the costings
This may be perceived as...
May I request you do this now?
I think there's been a misunderstanding.
What was the rationale behind that decision?
