Exam not conducting on omr sheet

I am working at CLW/Chittaranjan under ministry of Railways as a Technician. This month I appeared in a promotional exam of Inter stage J.E. (LDCE). I was shocked in the exam hall to see the answer sheets , which were given to us to write the answer. It was not an OMR SHEET. We were given totally blank pages to write the question and its answer by hand. The answer sheet had no carbon copy in between, no identity and no copy no. printed on it like an OMR Sheet. Mention one thing but the questions were 100% objective multiple type. While the Railway Board Rule 196 dt. 14.12.2018 clearly says that all the promotional exams should be on CBT Mode or on OMR SHEET. And in the past the administration had been conducting the same exams on OMR Sheet. Before this exam the administration has continuously conducted three such exams of JE on OMR Sheet and many other departmental exams also on OMR. The plain answer sheets can easily be changed with another one who have the approach but the OMR sheets are difficult to change as it has kept under the custody of two different officers at different places. And so the OMR Sheets are more reliable. My question is--- (1). When the Rly. Board has ordered to conduct the promotional exam on CBT or OMR Sheet how can the administration force us to write the exam on Plain sheet. (2). When the administration was continuously conducting the same exams in the past on OMR Sheet then why this time not (3). Should the administration re-conduct the exam (4). Result is about to publish, what can we do for the cancellation of this exam and to have a fresh exam. Thank you.