i-797 notice

I called and emailed the Lawyer October 3rd after seeing the case status change, she emailed me back 5 days later to tell me how every thing is going to plan and she did not know why they did not send her a receipt number. She told me with my case being approved on the Oct. 2nd, she should get her letter in two weeks. Today the 9th of Oct. I got my notice. I also called immigration to ask if it is true if my Fiancee will need all our correspondence from over the years that we submitted for the petition. They tell me yes she will need for her interview... Wonder why my Lawyer has not told me this.
So I asked, because she told me" Please if you have anything further, do not hesitate to contact us. Email is always best as I can answer day or night.. "
I am so frustrated. To any one doing this, Don't pay your Lawyer in full and make sure you like them and can ask questions. I will post again soon I hope.