discover the voice in the record

i did an interview to my friend Marco and i forget recording the auido. I don't want to bother he again with the same interview. I can hear a little with the recording of my microphone of head. I need somebody that can discover from the audio and do his voice understable. Here i upload 5 final minutes...i need to do this with 25 minutes more. If you can do it with this audio, then you can do it with all the recording. i have no a lot to offer you, only 30 usd. I hope that you can get the goal and help me...if you can with this one, you can do it quickly with the another 25 minutes and the 30 usd are yours. I use audacity but it's not so good. Show me what can you do with this 5 minutes and the project is yours...adjudicated to the best results. You can erase my voice...my voice don't matter, you can erase it. What i want is to ear the voice of Marco, you can ear it from minute 2:03 of this recording.