The US consulate in San Salvador is generally inaccessible and frustrating. It is almost impossible to talk to someone in person and the outsourcing of information to Mexico is extremely frustrating and prohibitive having to pay $7.50 for them to tell you to wait for to six more months. You can email - but it will take weeks for a response.
I have had some luck working through my senator's offices - but the information is often just to wait. At least they respond faster to my senators than they do to me.