I was recently ordered to show cause for probation violation (felony unsupervised) at court they told me I had new charges as well but didn't say what and case is sealed how can they do that without aressting me or giving me a ticket and how do I find out about charges?

An Order to Show Cause is a civil procedure (usually), not a criminal procedure.

You go to Court and ask what "they" are talking about. Sealed does NOT mean the authorities cannot see it.