voice chat constant isues

hi
can anyone help, voice chat is a complete pain, sometimes it works then it doesnt. i use a wireless G533 headset, sometimes cant hear chat, my mic is flashing but im making no noise, had this issue since got a headset. i even formatted my pc today, but still the same

15 3570k @4ghz
16gb ddr 3 ram
vega 64 gpu

any ideas?

thx in advance