Hope you are doing good in this pandemic situation. I think you are a bit confused regarding reporting time. You need to understand that the college would send an individual mail to your registered email ID with the proper reporting time. So please check the email id you mentioned while filling the application form and also check the mobile number. It is contact with you with the help of your phone number and email ID. If you haven't received anything you should mail them regarding the correct reporting time.

If you have any more doubts you can ask me in the comment section