Hi Geo,
Thank you for contacting the Microsoft Community.
I am aware that you did not receive your access key for the Microsoft practice test that you purchased, given the time and effort you put into preparing for the AZ-500 exam to demonstrate your abilities. Allow me to extend my help to you.
Since you mentioned that you already contacted Mind Hub and Pearson VUE, kindly provide us with the confirmation email when you purchased your practice test, including a copy of the conversation between you and Mind Hub and Pearson VUE. That way, we can coordinate this with our support team and request prioritization. You can send all necessary information through the private message I have initiated along with the requested information to locate and secure your account.
If you have any further questions, please do not hesitate to reach out and I'll be more than happy to assist.
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.
Best regards,