My case no hope

let me tell you my case.

I tried what ever people told me to do.
I wrote a letter to US Senator, they told me they are diff. dept. of US Embassy and they will respect their decision.
I went to US Embassy in China talk to them but they told me it's case by case and they don't give specific explaination why they rejected my parents.

If you mean write a letter then ask your parents bring it with them when next time they try again, then i would say it will help (did not help my parents). But other than that, have not heard anyone from i knew had sucess from filing some kind of complains

Only way is keep trying