If you are not getting any OTP, Kindly try using any other device or use it in the incognito window.
To Reset your CIT login credentials kindly click on this link to reset the password: https://cit2.internshipstudio.com/login/forgot_password.php
If you still face the same issue kindly take a screenshot of it and share it with us at contact@internshipstudio.com with your registered email ID.