Jazak ALLAH and thank you very much for the kind appreciation. Stay Blessed!

Nope Dear. Not at all. I am still, currently, in Islamabad, however, I sold due to some financial reasons (had to pay back loan, that's why).
May be, I upgrade any time in the future IN SHA ALLAH, whenever I have "Gunjayesh". 
Brother no idea. If the problem has been even before CVTF change, and after changing CVTF, the problem is still there, it means CVTF was not the culprit. Problem may be lying somewhere else.
Nope. No No. Not at all. You do not need to change CVTF again, provided it was 100% genuine and original, met / exceed OEM requirements, and proper quantity was filled (neither under-filling, nor over-filling)
If you would have read above, in my case, I went for Caltex CVTF, becuase it met the criteria of both CVTF-TC and CVTF-FE, and was at almost half the price of Toyota genuine CVTF. I drove my car for around 20,000 kms after changing CVTF by Caltex, and AL HAM DU LILLAH, never faced any kind of transmission problems, ever! 
Condition for any oil is: 100% genuine and original, and meeting / exceeding OEM requirements.
Since you have changed your CVTF from Atta Sb., I would suggest to visit him again, and discuss / highlight the issue. Since he already has seen your car, he would be able to better guide and judge.
I hope, it helps. Thank you.