My ex put my number down wrong to win the case and he did because I didn't know about the hearing what can I do?

Hello, it is difficult to determine your legal recourse without further information. However, I can tell you that the court does NOT depend upon one party's assertions for the contact information of the other. A person is not "served" with notice of a Stalking Protective Order until they are personally served (e.g. by a police officer). Accordingly, it does not follow that you would be defaulted for a Stalking Protective Order case, unless you were personally served by a police officer with documentation of a hearing and subsequently failed to appear. Regardless, you should consult an attorney to better assist you with these matters. I wish you the best of luck.