Go to www [dot] senate.gov - on the top right hand corner, there's a drop down box that says "Find Your Senator" - go ahead and select your state (and press Go), it'll show you who your senators are...
If you click on their name, it'll take you to their website. There's generally a section on the website that says "Services for ..... (people of state eg. Floridians)" or "Constituent Casework" or "contact" etc. Click on that and you'll get the procedures for "help with a federal agency".
If you post your situation - you might get help here though.... (as well)...
Good luck.