Get from here:
UBL Wiz Internet Card, This is a Visa card, which works online as well as on ATM. I can attach that to your Alertpay. There are 3 types of Wiz Internet cards, go to Travellers' card as it has maximum limit, it will take 48 hrs to get it activated. After 48 hrs call their helpline, give your info and get ATM PIN as well (Don't forget the secret code that you entered while filling form for Wiz card as helpline will ask you that every time you call them and change anything like PIN).
Card cost is Rs.100, which is waived if you deposit Rs.10000. Initially you can deposit as low as Rs.500. So roughly you get card in Rs.600 :P No need to purchase Prepaid Cards online from different websites as they will change you 3 times for something that you get in Rs.100 in Pakistan...yes Visa Card in Rs.100