Once a reply is given in open forum, believe in the reply. It is not easy to get any borrower arrested unless there is a crime involved. Are not you reading in the news papers ? If making default is a crime, most of the famous business persons should have been behind the bars now.
When certain guidance is given, take some time to ponder over the practicability with out apprehending or assuming something.
1.Immediately represent to the next higher authority through Regd post of such Manager/field officer explaining the difficulties and seeking for a compromise. But offer a reasonable amount, as offering less than 50% of outstanding appears too unreasonable.
2.Wait for 15 days and then go to Legal services Authority and file a Pre Litigation Conciliation petition (Not even one rupee cost is involved in this exercise)
3.The Secretary/President can decide on the issue, and even if the banker is not willing, they may order for accepting such sum, being a public utility organisation the decision/judgment is binding on the bank.
(If you wanted immediate solution, plan for a personal visit to the bank superior official. Search website, get the mobile no. of concerned superior, fix appointment, visit the office prepared with a concrete proposal and with blank cheques, Part with blank cheques only after the compromise is accepted in writing by the Bank)
Sorry. I stop here. As I can not offer any more guidance in this issue.