Hello,
If you are talking about apeamcet, then drop a mail at convenerapeamcet2019@gmail.com
If you are talking about tseamcet, then drop a mail at tscets.telangana@gmail.com
You can contact them on phone. They are mentioned in the links below-
https://apeamcet.nic.in/ContactUs.aspx
https://tseamcet.nic.in/ContactUs.aspx
Good Luck!