Hello Salini,
For changes with the booked exam on your profile you have contact the exam provider directly. As they have the access to reschedule the exam and check if you can use the same voucher. However, since you would like to change the scheduled exam, you may request for a cancellation and scheduled the correct one.
You may also see the terms and conditions of the exam discount you have attended regarding the cancellation and reschedule policy.
More information can be found on this link.
You can reach their Support through the following contact details below:
For Pearson, Contact: 855-542-6924, +1-952-905-7472 (toll)
https://home.pearsonvue.com/microsoft/contact
For PSI, you may create a ticket from this link. For immediate response from PSI Candidate Care telephone numbers please contact:
US/Canada (toll free): 855.340.3887
US/Toll number for International Callers: 858.875.3686
For Certiport, you may visit this link: https://certiport.pearsonvue.com/Support.aspx
If this solves your problem, please indicate “Yes” to the question. If your inquiry was not fully resolved, please post a new question so we may continue in assisting you. This case will now be closed and locked.
All the best,
