Tech Mahindra — Registration details regarding email not sent sir

Hi,
/
/ This is N Kumaravel. I'm writing this mail to ensure that I have registered for the internship program. But I had committed a mistake during registration i.e., in place of percentage I entered cgpa. So that it has shown that I'm not eligible for the internship. But I got the mail for the written assessment. While I'm ready to take the test it's asking for the registration id which I didn't get during the registration. So, Please kindly help me out through this.
/
/ Thank you.