My Employer has done summon in summary suit case on me for breaching employment contract

I had a 1-year contract with a company and have completed 10 months working with them last year in June. My CTC was 33,000 per month. Last year in the month of June I received only 20,000 as a salary for the month of May when I asked for the same why this deduction is done they said because I did not follow the office rules. I asked them a lot of times but no satisfactory answer was provided to me in writing nor any notification was shared with us earlier as to your salary will be deducted. Due to this I put a resignation to the company and said I will be working for the coming 10 days with you and leave after that, they did not accept my resignation and asked me to work for the said 1 year. When again I asked about the salary deduction no one answered me and dropped me a mail saying that if you want to leave, leave that will make the breach the agreement when I said you deducted my salary without any notification so you have breached the contract first. No one replied to me from the office after that. Now After almost 8-9 months they have filed a case ( Summary of recovery suit) against me saying I have breached the contract and are asking me to pay thrice the amount of my salary. What Should i do now ?