Hi,
OMG, that’s so annoying. I had one such experience not so long ago, too. 
Me: Hello. The file is ready for delivery. I have edited and proofread your document. I have also changed the font style to Calibri as per your request.
Buyer: I had a look at the file. This is unacceptable! 
Why haven’t you changed the font size to 10? Why is the document not formatted according to the New Zealand Papaki (
) style guide? Why doesn’t the document have an A3 page layout?
Me: I am sorry, but how was I supposed to know these specific requirements without you having mentioned any of them?
Buyer: Then why did you select the option “I have all the information I need to start working on the order”?
Me: 
How any of you dare to blame your buyer??? 
I have to agree with them, it’s both your fault for not having taken a clairvoyant course on Fiverr Learn !!! 
Oh noo, I feel for both of you! I know these clients too well…
So you too are guilty for not having telepathic skills… 
What a mess with these sellers…
I try to get on top of this by sending buyers an easy questionnaire to fill in, which covers all the details I could ever need. Sadly, this often works out a bit like:
Can I ask a friend? 