I do not think there is any way to contact Consulate in US over phone, they have automated response system. I was wondering if we can send a representative with authority letter
There is a contact us page on consulate site. Try email/fax/postal mail them.
FYI:They have guards there may refuse your entry into the building. Unless it's a very short walk for your rep to visit the consulate, I wouldn't send anyone before I know for sure they will be allowed in.