to change account details of my account from pg to ug
I think you want to change the status of your career360 account to 'in graduation(UG)' from 'graduate and above(PG)'.
You will face difficulty to change the status in browser version of career360 webite. First of all, download the career360 app from play store and login. Then you can access your profile in the app and edit your status to 'in graduation(UG)'. Just click on the three dot structure in the profile page in the app, then click 'my profile' and then the 'blue pen option' in the right upper hand corner to edit your status from 'graduate and above' to 'in graduation'.
Hope it helps!