Voiceover and facebook on iPhone

Is there a place that I can contact to give suggestions to apple or facebook about how voiceover is working with facebook on my iPhone? I am having a few issues that voiceover doesn't read certain things or let me open certain links... Like for example... when i'm scrolling down through my newsfeed, and a friend of mine likes a particular thing... it'll say "John likes this", but it wont actually say what he liked... or it'll say "john commented on this", but not say what he commented on...... or if someone posts a link or whatever, I can open there post and go to open the link, and it does nothing, it doesn't try and open it at all... I don't think it setting problems, I think it's just voiceover or facebook, the way they are programmed... any suggestions??? Thanks...