my J1 case was lost, please help me.

Dear brothers and sisters,
My J1 case was lost, so I want to re my fee $215 and documents, here is my questions.

1. Which one is the one that you use to mail the documents and fee?

A. Postal Service

US Department of State
Waiver Review Division
P. O. Box 952137
St. Louis, MO 63195-2137

B. Courier Service

US Department of State
Waiver Review Division
(Box 952137)
1005 Convention Plaza
St. Louis, MO 63101-1200

2. Money order or casher's check, and can you track your money?

3. using usps or registed mail?

4. Do I need write my case number on my copy documents?

5. How long will be showed on the web of DOS?

Thank you very much.