Dear all,
Thanks for your help, and as per all of you good fellow comments, one thing is crystal clear to me, that is i should ask for the accommodation rather then the accom-allownce.

but yesterday i have asked them to give me 700 QR extra, that is basic of 4000 QR, and 200 Qr for fuel.

If they don't agree to this then i will ask them for 4000 QR basic, and fully furnished single accommodation.

@Childhood: dear as you said in your first point, regarding the reputation of the company is Doha, its member of SALAM international but it is W.L.L licensed; and that is a concern for me too. Since in Pakistan i was in companies like KSB (German) and ABB ( Swiss/swedish). So, i haave some concerns about my future job too.
Gakhar!!!!