@Fahadtonde fahad kindly read my thread explaining about all the universities:
http://talk.collegeconfidential.com/pakistan/1912862-a-complete-guide-to-engineering-cs-university-admissions-in-pakistan.html#latest
I would recommend you to retake your AS while giving the A2 exams otherwise you are not getting any grade above C. The major CS universities of Pakistan include: giki, nust, fast, lums, itu, comsats, pucit etc and they all require same things: more than 60% equivalence and at least a CCC in A level. You must work really hard in A2 now and improve your grades and give your best in the entry tests. Feel free to reach out to me for further questions.