Hello aspirant,

The colleges mentioned by you are different. In the tag you mentioned Calcutta Institute of Engineering and Management and in the Question you are saying Calcutta University. The college mentioned in your tag is a private engineering college whereas the college mentioned by you in question that is Calcutta University is a government college also known as Raja Bazar Science College for engineering. If you are alloted a college and you want to take admission then you need to visit that college and verify your documents and then you need to pay the fees of that college. Mostly colleges ask you to pay offline through bank. This will be told by the college authority itself.

Thank you. Hope it helps!