What is the helpline number which I would call in case there is any problem/issues?
There are two options for you to get any help:
Option 1: You can call at +92 42 111-345-100 (international calling rate apply when you are calling from abroad) and you would be connected to Telenor call center.
Option 2: You can call at the roaming partner's helpline eg for Mobily in Saudi Arabia, it is +966560101100. Charges are Rs. 17 per minute (exclusive of taxes).