I need help! Got proof on my voicemail of an accident. Need a tech savvy person!

I was in an accident a couple of weeks ago and the lady told me she did hit me, did change from the right-hand lane into the middle lane, however she gave a different story to her insurance company. She called me just a few minutes ago and left me a voicemail stating exactly what happens, how she was indeed changing lanes and struck my car. I notified my insurance company and they said to download the voicemail to them online via geico.com (under my account, just like the photos I sent them were).

So, HOW DO I DO THIS???

I saved the voicemail message on my cellphone. I have an iPhone 5.  How would I download it to a file (I'm guessing).  How do I do this? Please help!  (What are the different ways to do it...I'm guessing it would be a file)

It's all the proof I have, right out of her mouth

I know this isn't controversial, please do not delete this post because I really need to find out how. I only hang out in CC and don't know who else to ask or where else to post this. I did look this up online, and I'm not getting anything. Thank you guys very much!