Need Help..I am stuck

I joined a company with a two-year bond and an initial salary of ₹10k per month. Initially, they stated that my salary would increase by ₹10k each year. However, after joining, I discovered that the actual increment will be only ₹5,000 to ₹6,000 per year. With this I can't able to support my family.Additionally, the company has retained my original Institue certificates and blank cheques with my signature. The company imposes a penalty of up to ₹1.5 lakh for breaking the bond, stating that this charge is for the training they provided.In the bond, it is stated that the penalty is to cover trainer expenses. However, no external trainer was hired, and the basic training was provided by the company’s senior employees.I now wish to leave the company and would like to do so without any conflicts.I would appreciate any suggestions on how to handle this situation..😖