You have to admit that it's very difficult to get admission in such a good Law college like SLS Noida, now that you are in the 138th position in the waitlist, chances would be less because many more applicants are waiting for their chances. Obviously you should not leave hope and keep on checking if selection happens or not, but by that time try for some other renowned institutions. Good luck!!Here is an overview of your campus

https://www.careers360.com/colleges/symbiosis-law-school-noida