Hi Eni,
Thank you for contacting the Microsoft community.
I recognize how important it is for you to reschedule your exam as you have merged your work and personal account recently and since then, you have been having issues with rescheduling. Allow me to provide the correct path to move forward.
For us to verify your profile and provide proper guidance to navigate this situation effectively, please share the information requested through the private message I initiated.
Meanwhile, since you mentioned that you have connected your work account, if you are an ESI learner or a Company discount was used to schedule the exam, please reach out to the Enterprise Skill Initiative support team as they are the dedicated team to assist with issues faced by ESI learners.
To create a case with the ESI support team, kindly go to the link I provided on our private message and login using your company email, then select the Create Case option and provide the information requested on the "Open a New Case" form and attach all necessary documents such as screenshots of the confirmation email then click submit. You will be provided with a Case ID to track the progress of your case.

Should you already have an open case with ESI Support Team or Pearson VUE, please share the case ID with me.
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.
Sincerely,