Larsen & Toubro Infotech [L&t] — I'm complaining about the employment bond

I joined LTI in June 2021 and I had signed a bond of 2 lakh for 2 years. I left LTI in Feb 2023. After leaving they asked me to pay 2 lakh rupees. I had served more than 80% of the bond period still I was asked to pay 2 lakh. I talked with the HR and my manager and they reduced the bond to half amount i.e 1 lakh. I am asked to pay 50% of amount even after serving 80% of bond period. The HR is not reducing the bond any further. The training that LTI provided had 0 use in my tenure at LTI. I was working on a technology which I learnt on my own. What should I do?