Souheir. I have been told that you have to go to Gharrafa and ask for Captain Nasser El Attiyah.
you talk to someone over there or if you can to the Captain and tell him your case and he will directly sign your visa.
as for me I will wait till the end of this week. but if you want you can go there and give it a try. you have to go between 6AM at 11 AM.