If order status is FINISHED, you cannot do anything to claim your money back, unless the seller offers "15 days longer protection" which extends beyond the order completion date. Then you might still be able to make a refund request.
When the seller extended processing time by 22 days. If you still did not get your parcel when the 22 days were ending you should have raised a dispute, since you did not, buyer protection has ended.
Now all you can do is hope the package arrives. You can email Pakistan Post with your tracking number and ask them about the status of your package Pakistan Post Office Department