Tamil Nadu Public Service Commission [TNPSC] — tnpsc one time registration

Address:

Tiruchirappalli, Tamil Nadu, 620102

I have to apply for tnpsc group 4 2019 exam. But i forgot username and password of one time registration. Now i'm unable to apply for exam. There is no response from tnpsc customer service. I tried to find out username and password with email address and phone number. Unfortunately those were not accepted. Those were not registered information. I completely forgot my registered information. Tnpsc is asking for registered information to recover id and password. I don't know what i should do. Where can i find my details. Kindly help me to appear in exam.