Filing a contested divorce petition

Sir/Madam, I want to file a contested divorce petition. I got married in April 2017. My wife is suffering from hypothyroidism wherein she faces frequent mood swings, excessive anger, unnecessarily cry, anxiety etc. Out of anger she puts any random allegations on me and her family uses wrong languages and attitude towards me and my family. The way their family talks and threats has caused enough damage to my mental condition and health. In all these tension I’ve lost almost 9-11 kgs of weight and presently I weigh less than 50 kgs. No doubt I love my wife very much despite all her health issues but her family is the real cause of problem between us. She can be easily persuaded and presently she is standing in support of her family and against me. Her hypothyroidism level to the best of my understanding is high and she consumes 350-400 mcg tablets daily. We have tried all possible ways of solving the matter but she’s not returning back from her home. Kindly let me know the cost of contested divorce petition if I file a case in Kolkata. Thank you.