This is as per the limited information posted by you.
The transfer order seems to be effected after submission of resignation.
In case of Physically Handicapped person there are rules that have been framed and are in place.
These rules should be available on website of the bank and union.
There are judgments establishing rules and laws in case of transfer of handicapped persons.
The rules and judgments are attached for your reference.
Then there are enough publications of rights of persons with disability.
If there is any violation of the rules then you may succeed to claim bias, and malafide in transfer.
Even if the bond is signed the liquidated damages stated in the bond are to be substantiated.
The service agreement/Bond drafted by the bank should be in lieu of some extra ordinary favor/training by the bank.
Has the bank incurred some expenses on your training?
The conduct of your superiors is bad as they have asked to resign.
They should have restricted and limited the working hours to prescribed working hours.
Did the bank ever stated in writing to do OT, record actual working hours/day and recorded OT and paid OT?
Did you ever placed your grievances in writing on record?
The CCTV footage of the bank should be able to prove the unauthorized working hours/OT.
All of this must establish that your employer and superior violated its own policies/rules and bilateral agreement signed with you, can be charged for misconduct are unworthy of being employed with, hence in such a case the notice period/pay, liquidated damages stated in Bond should not e applicable.
You may show the job advertisement, job application, selection letter, offer letter, appointment letter, standing orders applicable to the bank, Service rules and transfer policy of the bank (that should be available on the bank’s website and also on website of bank employee’s union), copy of resignation posted by you and its acknowledgment, declinature of resignation, transfer order, legal notice sent by lawyer of the bank, and any other communication and give inputs in person to a competent and experience labor consultant/service lawyer and also seek guidance and support from your bank employees union and separate union if any for PH employees.
You must get some remedy and relief.