The company is lacking severely in professionalism and dignity. I am glad that I dodged a bullet.
They sent me an assignment in Angular which I did for more than a week. I thoroughly went through all the pointers of the assessment documentation they sent and I created the test application. After around a week, I sent it to them.
Two days after that, they sent me a rejection mail stating that the application was received positively but still they won't consider my candidacy.
Wasting a candidate's time and efforts and not even scheduling an introductory round speak volumes about this company's integrity and professionalism.