Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
What the scholars in Pakistan said is the right and correct opinion. In fact, fasting the day of Arafah is not linked to a place. It is rather linked to a time.
So, if it is proved in your area that Arafah day is a given day, you should fast that day. This should not be a matter of disagreement between people in the same country.
We implore Allah, The Almighty to guide all the Muslims to the right path, and unite them.
Allah knows best.