Whatsapp on iOS, how to delete voice messages? Some of my Whatsapp group chats contain about 100mb of voice messages and I want to get rid of them. However, they are not being displayed as "media".

On Android I could just go to the Whatsapp data folder and delete them from there but I can't access that on iOS. 

I've also found the whatsapp support being useless, so I am trying here.
Now, after 1000 views on this question it's worth updating my answer:

Recently, a function has been added to Whatsapp that lets you delete ALL voice messages from a chat.


open Whatsapp
hit "Settings"
click "Data and Storage Usage"
click "Storage Usage"
select a chat
click "Manage..."
remove every checkmark except for "Voice Messages"


(You can also delete other stuff in there but I wanna keep all of that haha)