Hi Aravind,
Thank you for contacting the Microsoft Community.
I am regretful to hear that you were unable to take your exam due to some difficulties you encountered, we value our customers' time, and this should not have happened. Let me provide you with the appropriate team that can further addressed the issue you encountered and provide you with rescheduling options
I did some research and since you waited on the queue for a very long time that causes you to missed the exam, the quickest way for this to be resolved is to contact Pearson VUE to file a report so that their team will further investigate on what happened during the check in process and avoid having the same problem in your future exams. Once the issue has been corrected, their team will assist you in setting up a new date for your test in real time.
Please contact their direct support using the link below based on your region:
If in any case that you were able to contact Pearson VUE support and need additional assistance, kindly provide us your exam registration ID and exam email confirmation along with the details I have requested via Private Message so, I can have this escalated to our Support Team for continued assistance.
Should you have any questions regarding Microsoft Certification profile access/benefits and exam registration in the future, please don’t hesitate to reach out to us by posting a new question.
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages. Thank you.