Hey, 

Seeing your marks you have not qualified for the advance exam. Thats okay. 

If you have given other exams for the other private colleges like birla institute of technology or manipal institute of technology or srm etc then you can use their exam cutoffs to get into those colleges. 

If that dosent work out there are multiple colleges in cities such as mumbai and delhi ( nm etc) which have rather easier entrance exams. 

All the best.