Hello.
Because regular mail is my country is really bad, what I did was fill a courier address in USA, so that they forwarded it to me.
I'm sorry that you haven't received your documents from WES, but if you ask them to send them again, I recommend doing what I did, as they send it to USA really really fast.
As for CIC, they should have electronic access to your WES file, but I think they ask you to scan the original ECA you received phisically by mail, and not the PDF from the email. But I don't remember if I'm confusing that instruction with the instructions from OINP. So please, confirm that info.
But anyway, if you do what I tell you, maybe you should receive your original ECA way before you need to scan it.
For the EE just complete the info with the form number and you'll be good to go.
Regards.