Please convert instagram video into audio with highest quality converter

I need a professional who can convert an Instagram video into a WAV audio file for me. The audio has to be 100% perfect, with no loss in quality. I have turned down 5 or 6 people already who used third party tools and the quality wasn’t quite good enough. I can tell the difference between the original audio and the conversion. That’s not good enough. So please let me know how you plan to convert this Instagram video to audio, using the highest quality converter available.
Thank you.

Here is the instagram link.
https://instagram.com/p/DEqFmrdgQpG/
Send me a sample of your highest quality conversion if you’d like, and if it’s perfect conversion, I will buy from you.