First, there's an IG Mushtaq in Punjab. That's what the SP considered.
Second, regarding the word barhiya, do you think an SP, will be pointing out or considering nuances of language and not $hitting his pants, while talking to an IG. If you think that then obviously you don't have any experience with police systems in the subcontinent.
Third, here's the official response from your government:
"The Foreign Office spokesperson said we hope that CNN will take up the matter very seriously with the affiliate Indian TV channel and initiate action against the channel, as not doing so will be regarded as directly owning to this unethical and manipulative act. He said Pakistan reserves the right to take necessary legal action against the said TV channel."
http://www.radio.gov.pk/06-Oct-2016/pakistan-condemns-airing-of-fake-program-by-indian-media
Now I don't know about your legal expertise, but I have argued cases right up till the supreme court of my country. So I'm presenting the point of law:
CNN hasn't taken any action against their Indian affiliate till date. The Indian affiliate hasn't retracted the sting. In fact the sting still features prominently on the affiliate's website. At that remains is for the Pakistani government to take the necessary legal action as stated. When it successfully initiates any legal action then and only then would your argument carry any weight. Till then the argument is completely hollow.
Note that, any senior journalist of a reputable media house, is not going to ruin his entire career for a fake sting that can be exposed in a court of law, by simply comparing voice samples of the said SP and the voice in the recording.
It is very easy for your government to take the necessary legal action, expose this journalist, and salvage the honor of Pakistan. Wonder why it's not doing so? Maybe there's no honor to be salvaged? Now sit back, ponder over this, and enjoy..