But I just received a text message saying that I was sued in the people's court and I have filed a case. In three days, the local court will give me a subpoena. wait patiently

This is a typical fraud, which has been going on for many years. You must ignore them, let alone send them money! This is to scare the recipients with threats, contact them, and they will try their best to trick you into sending money. So, no matter what they say and how they threaten you, don't pay attention to them anymore, so it's okay and nothing. Just rest assured.