Remedy as company not paying salary as employee wants to leave

Hi Team, Recently i joined a company and after one month of working i didn't find comfortable over there to work. And now i told HR about my working status with company. & Now HR is saying that they cannot pay the salary for a last month. So i need your valuable advice what should i do. Right now i am having company provided Laptop and HR asked me to return that and for sure i am going to return it but what about my salary for last month which they are not providing. Please help me in this regards