If you could tell me the city in which you are looking for, I could help you more.

Bcom Honours is a 3 year course with undergraduate level. And Delhi University(DU) is best known for the course as it has a great value ahead in future when it comes to post graduation from India or even abroad.

Top colleges for B.com Hons, govt. affiliated in Delhi are - 

• Shri Ram College Of Commerce: Best Commerce College (North Campus)
• Lady Shri Ram College for Women (North Campus)
• Hans Raj College (North Campus)
• Hindu College (North Campus)
• Sri Venkateshwara College (South Campus)
• Jesus and Mary College- Only for girls (South Campus)
• Ramjas College (North Campus)
• Delhi College of Arts and Commerce (North Campus)

Their cut off every year goes almost above 93%. It is very difficult for you to get B.com Hons in a DU college as your marks are not that high but still there is a chance in few of the DU colleges in maybe 4th or 5th list.

Here you can check the cut off 2017 of all the DU colleges-

http://www.du.ac.in/du/index.php?page=cut-off-2017

And these are dates for cut off 2018, DU-

https://university.careers360.com/articles/du-cutoff

Keep checking the Delhi University official site and donot miss out any list.

Hope for the best. Good luck!