Tech Mahindra — Didn't get any registration ID and PIN

I was tried registering for Tech Mahindra Drive for Associate Software Engineer
(https://registration.techmahindra.com/Candidate/Instructions.aspx)
on[protected]. But after entering all the details, it is shown that "i am not eligible".
When i tried it once again it is shown that "You are already registered. Please login with your registration ID and PIN to complete/view registration." Though i tried with different mail ID, but the same problem existed. Please go through my issue and resolve it, by that i can complete my registration process.

Thanks and Regards
Prabhath