All service and support in that part of the world are through resellers/dealers -- Dell does not have a corporate presence (or support) in that part of the world. In general, though, warranty extensions are expensive (in the US, they're about $400 for just one year).  You may be better off saving the funds for any needed repairs.  
To extend the warranty is like trying to reach the moon with a kite. Numbers on partners in Egypt, Dubai they never answer ....websites you get this provoking message one of our staff is going to call you in 2 days, which never happens Big mess. Any clues ??? 
Warranty extension