I think the best you can do in this situation is what Nathrao suggested in his first reply. Quoting as it is. "You will have to meet them and persuade them by showing the appointment order and concerned clause. Legal remedy is there but it will be time consuming. They may stick to the condition that you need to serve 2 month notice or buyout 2 months and not i month notice and i month pay. Polite and persuasive negotiation will only help you to leave the job in time."
You seem to be in hurry for some reasons on leaving this job by 31st Jan. Which means you have couple of days to make best possible efforts. You would not want to get into legal predicament...trust me, so it is best that you talk to the senior management and get yourself out of this situation. Arguing or threatening on the grounds of legal action will not only be time consuming but also cost you lot of money and trouble. Instead you invest that time and money and efforts to find the right solution. If you have had good employment record, I don't see a reason why they would be so stringent otherwise, even when you are ready to buy out as per the clause in appointment letter.
Good luck!
You seem to be in hurry for some reasons on leaving this job by 31st Jan. Which means you have couple of days to make best possible efforts. You would not want to get into legal predicament...trust me, so it is best that you talk to the senior management and get yourself out of this situation. Arguing or threatening on the grounds of legal action will not only be time consuming but also cost you lot of money and trouble. Instead you invest that time and money and efforts to find the right solution. If you have had good employment record, I don't see a reason why they would be so stringent otherwise, even when you are ready to buy out as per the clause in appointment letter.
Good luck!