Company shall have to find and induct your replacement, hence the demand of the company to pay the amount. In any case termination has been decided.
Termination is justified too. The only relief your company indicating to you is probably that no complaint for the offence is being filed and matter is being resolved within walls of the office, as per the decision of higher authorities as deemed fit. Company does not want to bear any expense of complaint and legal support at your location.
You shall have to work out a way out for yourself, to wriggle out of situation.
Approach a lawyer in person at your location and show all records, docs, onsite appointment order, and give inputs in writing. Who is paying you the salary and in case of Master Servant relationship {Employment Contract} who is the Master {Employer}? Who shall conduct the inquiry, onsite employer or Indian employer? Are you a workman?
Your lawyer {at your workplace} may advice you not to accept anything in writing, and may have a strategy to help you exit without heavy and damaging penalty. Your lawyer may advice you that company may call you back in writing.
If you come back, you may first firm up a lawyer for you, and approach in person.
Online consultation has its own limitations.
There are corrupt individuals around, and your employer may also be corrupt, however it does not mean that employee should be corrupt. Let it be the last such mistake.
Your lawyer may advice that there is no merit and scope of defense.
Your employer may be a strong willed employer. You are closest to facts.
You alone shall have to take a final call. Weigh all pros and cons. Seek the counsel of elders in the family, competent and experienced well wishers. Your elders and influential acquaintances may be able to convince your Indian Office to spare you with loss of employment by resignation, and company may agree by accepting the payment as per contract and resignation.