Help fixing the call audio

My guest on the phone had a bad audio
Audio here
https://www.spreaker.com/episode/29900718

Can you please tell me how to fix it with Audition?
Thanks

My guest on the phone

It sounds like normal phone call sound. Were you expecting studio sound? Even if you have good capture services and a nice connection, the sound is only going to be as good as the guest’s phone.

There are no good way to “fix” that. Some voice tones just aren’t there in some phone systems.

how to fix it with Audition?

No. This is Audacity. Audition is the Adobe sound editor.

Koz