Microphone issue faced during the start of ph test

I faced the issue in the microphone check during the ph test . No body from the team responded to my problem.
I applied for the test on 3rd march 10 am slot, since I was not able to attend the test due to the microphone issue I don’t know how to proceed further. I’ve tried to reach to the team by calling on helpline number but there is no respond on the helpline number. Also I have sent a few mails to the team but got no response from them.
Please resolve my issue and let me allow to retake the test on next slot.
Kindly email me with a resolution on kelaprakhar@gmail.com