OP, I'm so sorry you're going through this. You must be devastated.
Please know that you will have a relationship with your son in the future. What that looks like depends on many things, but can be influenced strongly by what you do now.
Please do look into the advice and links from PP about child to parent violence. The more you can learn and understand about this, the better you'll be able to support your son to adulthood and a positive relationship between the two of you.
Your son will be doing this for complex reasons no-one on this thread will understand (but spoiler alert, they aren't because he's a waster / bully / like his dad). Factors that lie behind child to parent violence range from mental health, substance abuse, experience of past trauma, learning difficulties and many more.
He won't have been able to control the outburst and will now be feeling a massive sense of shame, which is intolerable to him and he has hidden it behind a shield of anger (towards you or the world) without knowing it. This is very common. Therefore he can't face you, and believes he's angry with you/happy with his dad/whatever.
At some point he will be able to face you/what he's done to you, and it's important that he can see you as the safe person with unconditional love for him that you've always been, in order for you to help him overcome this terrible spiral he's in. So just accept this, stop any pleading messages or conditions, and simply let him know you love him and you look forward to seeing him when he feels ready
Once trust between you is there - you're the adult so it starts with understanding from you (which isn't the same as condoning the behaviour) - then you can help him access the help he needs. And he definitely does need help.
In the meantime, read up on CPV and join a parents support group, you'll feel so much less alone. You haven't failed at all, and you have the power to change his life (and yours) massively for the better.
Good luck OP