Very Urgent-AWS Certification Account LastName update

Hi, I raised multiple cases in AWS support(https://support.aws.amazon.com/#/contacts/aws-training) to update the Last Name in my Certification Account profile to comply with my Id proof. I don't have the last name in any ID proof and want to leave it blank. I didn't hear back from anyone. Please help me update my Last Name as I am planning to take the exam on 28th September 2022

Email Id: *****

AWS Candidate ID: *****

Current Last Name: *****

The last name to be changed to No last Name-Please update it as Empty

Thanks in Advance!