Simple steps:
1. Just file a RTI under department of Higher education
http://rtionline.gov.in/index.php
2. Sign the petition
https://www.change.org/en-IN/petitions/iim-indore-for-cat-2013-results-re-evaluate-the-results-of-cat-2013-and-clear-out-the-normalization-process-used-by-prometric
3. Join FB Group
4. Fill your details in spreadsheet
https://docs.google.com/spreadsheet/ccc?key=0AihTnQmX7NamdDVKU3EzTXRKcUM2TGFsRE5jVjRfcXc&usp;=sharing#gid=0
5. Mail to catcentre2013@iimidr.ac.in and cat.candidateservice@prometric.com.
please mention your slot details and Cat registration Id in the mail.
6. Spread the news up to your best effort on facebook, twitter, pagalguy and other social media.
Other Steps:
1. Contact press media to escalate the issue.
2. Contact Admission offices of all IIM and other reputed colleges regarding this discrepancy.
3. If nothing works then file a case against IIM Indore(It should be the last step).
Suggestions:
1. Do not lose hope
2. We should fight together
3. Nothing is out of ambit of Justice.
Related Articles and links:
https://www.pagalguy.com/news/90-percentile-one-section-30-other-cat-a-18598960
http://www.firstpost.com/india/cat-2013-even-with-a-blank-sheet-you-can-score-in-55th-percentile-1341407.html
http://pagalguy.com/forums/cat-and-related-bschools/official-cat-2013-aspirants-t-88203/p-18588708/r-18593357
https://www.pagalguy.com/news/cat-you-seem-losing-credibility-a-18612882/
http://articles.timesofindia.indiatimes.com/2010-03-11/india/28119942_1_prometric-satish-deodhar-iim-directors
http://indiatoday.intoday.in/education/story/cat-2013-0-marks-equal-55-percentile/1/336478.html