Hey buddy, Sorry to see that you are having an issue with you're brand new Asrto headset.
Unfortunately you haven't really explained what the problem is?
So i'll just explain how to set it up you're new headset.
First of all, You need to update you're Xbox one controller do NOT have anything plugged into the bottom of the controller, go to settings, system and update you're controller.
Then simply connect the M80 adapter into the bottom of the Xbox one controller then connect the wire/cable from the M80 adapter into the Astro A40 headset.
That's it as far as the "setup" goes.
So let's move on over on how to use the volume controls.
Right then so let's turn you're Xbox one controller while you're M80 adapter is plugged into you're Astro A40 and into you're Xbox one controller.
Now to see if its set up properly and working just simply push the button in that is located at the bottom on the M80 adapter and if its setup correctly it will light up red, I'm am going to presume that it does light up red which means that it is set up correctly.
Moving on you will see a white LED bar in the middle of the M80 adapter, Now basically on the left hand side is voice sound (Which is game and party chat) and on the right hand side is game sound (Which is sound that comes from games ect) so in a nut shell the side that is more whiter will output more of that sound then the other, So for examaple if the white LED is all the way over to the right hand side this means that you will only hear in game sound (No voice, game or party chat) so if the white LED is all the way to the left then all you will hear is voice, part and game chat (No in game sound) now you can tweek this balance as you see fit but for me personally I have it set more 75% voice chat and 25% in game sound, Only because I find the Astro A40s fairly loud.
Now once you have found you're balance you need to adjust the master volume which is the rotating circle button at the bottom of the M80 adapter, I am almost certain that turning this to the left will lower the over all volume of everything and turning it to the right will increase the volume of everything, Now again this is up to you what you want to set it at but for me personally i have if just over half way so pretty much in the 1 o'clock position.
As for muting you're microphone, All you need to do is press the button inwards at the bottom of the M80 adapter and it will light up red, Which means that you're microphone is now muted and to un-mute it you simply just push the same button in again.
Hopefully this has helped you out a great deal and if you have any other issues then just contact me and i will try my best to assist you.