Acha, dekho. Pehla step hai ke song ko studio mein record karwaya jaye. Phir song ki video bhi laazmi hai, kyunke video ke bageir promotion impossible hai. Phir video ko Pakistani music channels ko bhejo (AAG TV, The Muzik, Play, Indus Music, etc etc) and they'll play your video for free.
Phir video record company ko send karo. Is waqt Pakistan mein sirf aik hi hai, Fire Records:
http://www.firerecords.com.pk/
Unhein contact karo, information lo, aur unhein video + song send karo.
Is ke alawa aur koi tareeka nahi. Try karte raho, inshAllah zaroor pick ho jaoge.