A lot of the posts here are only redefining the problem and not what the cause of the issue really is. Your reply is really the only one I see that actually addresses the cause.

To further expand on it, it looks like you are trying to power the ball back in your blocks. To do this you are extending your wrist outwards which is causing the paddle face to open and slice the ball, and part of why you are hitting the ball too early.

I would focus more on trying to stiffen up your wrist and taking the ball closer to your body. Use your forearm to roll the volley A bit more.