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There is a phone # or an email address at My Esri</a
Hi Mohamed,
Have you contacted Esri support? There is a general phone number for support at 1 (888) 377-4575
Also, there may be a regional office near-ish you. From looking at this site: Contact Us | Esri About
I found this:
Serving GIS Users in Sudan
Esri Northeast Africa13 G Ahmed Kamel St., off El Laselky St.New MaadiMaadiCairo, EgyptAhmed MounirAhmed Abdel AalE-mail: info@esrinea.comE-mail: ahmed.mounir@esrinea.comE-mail: ahmed.abdelaal@alkancit.comPhone: +202 25170612Fax: +202 25170618Website: www.esrinea.com