Links included in the doc to find your elected officials and/or call or fax 'em:
Find your House Reps: https://www.house.gov/representatives/find-your-representative
Find your Senators: https://www.senate.gov/senators/senators-contact.htm
5 Calls for phone numbers to call your Reps/Senators: https://5calls.org/
Send a fax (5 free faxes per day sent via browser): https://faxzero.com/