I understand you are experiencing issues with your A50. Here are a few steps you can take to attempt to remedy the issues.
If the A50 headset is not responding to on/off press and hold the power button to begin pairing the unit. Once it turns white and begins to flash, press the button again and see if the headset powers off.
Allow the A50 headset to completely drain of battery.
If these steps did not alleviate the issues you were experiencing, please go to the link below and submit a case. Let your agent know all the steps you tried and the outcome of your troubleshooting. It will help speed the resolution of your case: https://www.astrogaming.com/contact/