No Voices Issue

I use to have problems with Kinect too until I got an HDTV mount for it, it use to be kept at the bottom of my Sony KDL40EX720 near the TV's built in 2x10w sound bar. But since it's not sitting close to the speakers and when I calibrate it, and since I got
the HDTV mount for the Kinect, it picks me up well. When calibrating, try testing it with your speakers as QUIET as possible WITHOUT the Dashboard saying your speakers are too quiet. It may pickup background noise but noise is better than not being able to
pick up anything at all.

And just to let you know, Voice Commands ISNT perfect. I have to change my locale to Australia (I'm NZ, Australia is only 2 hours behind NZ time) because Microsoft still has it locked for NZ locale. Even Google and Samsung allow you to do voice commands
for NZ locale on their Samsung S5. And it works well. I can say Xbox Home/Friends/Messages/Play... and it works fine. But I do have to sometimes repeat myself.

So I ended up fiddling with the settings available on the website only and I found some that were inhibiting me. I can now hear chat on my account! Yay! My mic still isn't being registered but I have a feeling that's unrelated so I'll have to deal with it.
Thanks everyone that had some advice, especially Mister Fitzer.

Have you checked your privacy settings thoroughly? If you're blocking any content, that may be what's at play here. Please check that out and let me know what you find/what your settings are currently at.

Antillion brings up a good point. You may want to try connecting directly to the modem (you'll need to power cycle it first though, by removing power for at least 15 seconds), to see if that makes any difference.

Re: Miss Portia - I do not have another headset complete with a mic, but I have plugged in a quality pair of headphones. Game music/sound works fine but as usual no voice chat. The same is true for just my TV speakers, no voice chat plays there either.

Re: Insane54 - I do not have the connector cord for the controller to headset with the mic. From previous experience this does not stop the chat from being played, but it does significantly lower the volume. That's just what seemed to happen to me though.
If that stopped me from being able to hear in the headset I would accept it, but I can't hear it even on the TV