hello, J Ahmed, 

Look don't worry if you didn't qualify JEE Mains. There are three ways through which you can get admission into any college. First through JEE main score, Second through college entrance exam and lastly through management quota.

Now some of the good colleges based on students reviews are KIIT University, VIT University, SRM University, Manipal University, LPU, Chandigarh university etc. Try to read reviews of the other students as it will help you know more about the college education sysytem and placements. 

Check the following link to know more about the college.

https://engineering.careers360.com/colleges/ranking/top-private-engineering-colleges-in-India

Hope you find this information useful. Have a great future ahead.