Find a right broker or multiple brokers. I shorted with no issues. By the way after hours price is a mute on these instruments. I take it as a bonus.
If you cash out tomorrow say 16k total , what can you make out of it ( Using past 12 years of experience) in next 1 year ? GL.
Did you closely saw the VIX action on monday and tuesday? Sell pre market. If you must make money back from vix products then consider buying xiv with the proceeds. You might get your loss back in a week. GL.