How hard is it to correct a mistaken transaction at a Pakistani bank?

An error is an error is an error. It needs to be fixed. Be it small or large.

Here is what I would suggest.

• Document everything!
• I really mean that - Document everything! Your calls (whom you spoke to, their full name, designation, time/date, etc.)
• Make notes of your conversations
• Follow up with a written email/letter if necessary.

Send your grievance to:

• Banking Ombudsman (See: http://www.bankingmohtasib.gov.pk/)
• Write a letter to the Head of Retail Banking of your bank
• CC the Head of Internal Audit of the Bank
• CC the President of the Bank
• CC the Head of Customer Support for the Bank
• CC the Banking Ombudsman
• CC the Director of BPRD (Banking Policy & Regulation Department)
• CC the Director of Banking Inspection (On-Site) Department
• CC your Lawyer.

Politely include all the facts, and explicitly state that you want remedial action within 5 business days on receipt of this letter.

If that doesn't work, inbox me and I will try to help you. Usually, the above works VERY well.