I am sorry to hear about your failed exam. If you haven't already done so, you can look at the exam topics for the 640-692 RSTECH exam so that you can become familiar with the general guidelines of the content that you may see in the exam. However, please note that other related topics may also appear. For the exam topics, visit https://learningnetwork.cisco.com/docs/DOC-11795
Since you have mentioned that you already opened a support case with the Certification & Communities Online Support team, they will be able to assist you further with your inquiry.
Good luck on your next exam attempt!
Cisco Learning Network Moderator