I have less then 50% in graduation. What can I do for getting in good college for PGDM or MBA?

Sorry! You will not get AICTE approved MBA/PGDM degree in Bangalore. If any college taking you, you can get distance degree in regular mode means each & every day you'll get classes but the degree will be distance just like those colleges are providing MBA degree from Annamalai University in Bangalo

Getting into the top reputed IIMs will be tough if I may be honest, however, there are still many good colleges that you can get yourself into like XLRI, FMS (though you would need a very high percentile), IIFT and others. Just prepare extremely well for the entrance exams and you still would have a

Hey Rajat, For graduation, you cannot change your marks. The best thing you can do is score as high as you can so that chances for getting into good college increases.