What to do if fake FIR is filed against me?

Sir/Madam, I recently messaged a person asking for call girl. My exact watsapp message was " Hi, I need service for tonight" then nobody replied. So deleted the chat next morning as I felt my actions immoral Now, next day after noon, a person called me on my phone Person : "app ladki book kiye the, payment nahi hua hai. Ab ye ladki ro Rahi hai aur police choki ke pass baiti hai, police compliant karne ke liye. Kya karna hai, complaint kardu? Me: " what complaint, and blabbered something something. Then I immediately cut call and blocked him. Please tell me what to do, will there be a case against me. I am scared. I am such an idiot who couldn't control my lust.