I contacted my congress man here is how I did:
Go to the website I believe it is something like congress.gov, type in your zip code to know exactly who represent you, go to his or hers website. There you probably find an explanation how to contact him/her.
In my case, there was a form you had to fill out to give the congressman permission to review your case. It was straight forward.
I stopped at the form because I am still within the projected time range and I did not want to use the option until more critical/important.