Hi Lucy10,
please send an email to ImmigrationVisaNairobi@state.gov they should be able to assist you.
Once they release your visa you should receive an email like this.
Dear ....................., This email is to inform you that a document has been submitted to the courier by the U.S. consular section for return to you. On average, it takes one to two business days for the package to be available. The document is being sent via the courier option you selected at registration. The air waybill tracking number for the package is.............. You will need this number to receive your document. For additional information on the current tracking status of the document, the delivery location, or for a list of identification required to receive the document, please log into our website at http://usvisa-info.com. Please remember that you must use your passport number, date of birth, and nationality to log into the system. For your reference, the passport number we have on file is:.......... Your documents will be available for pick-up at: .............................. Note: Documents not retrieved within 20-30 days (depending on country) will be returned to the Embassy/ Consular Section. For documents belonging to minors, parents must bring a copy of the birth certificate. If the person collecting the document is not a parent, you will need a notarized power of attorney and a photocopy of the ID of legal representative issuing the letter. Changes made to the courier location after this notification, will not be processed. Sincerely, The Visa Information Service
I already wrote to the embassy, using that adress you said on Monday
but no answer.