SMEAT

Hello Aksath Singh, your ranking in Andhra Pradesh entrance exam is indeed quite good. I am sure with this ranking you will get admission in the college and the branch of your desire. However the rules regarding free seats keep changing. Hence you need to keep track with the website of directorate of technical education of the state of Andhra Pradesh for any new announcement for this. But many private colleges do offer concessions in fees ranging from 100 % to 10% depending on the ranking of the student. Best wishes to you.

No, you don't have a chance of choosing new choices.

Hello,
If I may say so, you have got rank on the lower side. However, whether you will get admission to your desired college will depend on how those placed above you give their choice. To help you I am attaching a link that will predict the branch and the college for you based on your performance in this examination. https://www.shiksha.com/engineering/ts-eamcet-college-predictor
Best wishes to you.

You have not written about the entrance exam for which you obtained this rank. However if this rank is for AP EAMCET, then you can get the following in Anil Neerukonda Institute of Technology and Sciences.
1. ECE
2. EEE
3. Mechanical
4. Civil