Hi Rizwan,
Thank you for contacting the Microsoft Community.
I understand how important it is for you to successfully schedule your DP-203 exam along with your ESI discount as this will help you reduce the exam fees. Allow me to provide the necessary support to address your concern.
Since you're trying to utilize an ESI discount, it is best to reach out to the ESI Support Team as they are the specialized team to handle active ESI learners with their concerns. I assure you that they'll provide assistance with care on your concern until all is resolved. Their contact details have been provided in the private message.
Additionally, as per the FAQs of Pearson VUE, the payment methods they accept are American Express, Discover, MasterCard or Visa debit or credit cards. They also advised to ensure that the card you're using is not restricted to do global transactions for the payment to go through.
Let me know if you have further questions and I'll gladly assist.
Otherwise, if this solves your problem, please indicate “Yes” to the question and the thread will automatically be closed and locked. In case we do not receive a response, the thread will be closed and locked after one business day. Please be advised that after the case is locked, we will no longer be able to respond. If the resolution provided did not resolve the issue, please post a new question.
Kind regards,