Dell Technologies Customer Service Representative interview questions

I was a college student at that time and I decided to do any part time job to support my basic needs. I posted my profile in an online job portal. I was contacted by an outsourcing company which referred me to Customer Service Representative job at Dell Healthcare, DLF IT Park, Ramapuram, Chennai. I specifically told them that I'm a college student and I will have only HSC marksheet during interview. They said HSC is also one of the qualifications for that job and so I can attend it. Believing them I went for the interview. There were few other graduate candidates for the interview. An employee came and asked for our interview call letter. While giving the letter, I told him that I'm a college student and I only have HSC documents. He told other candidates to go to other room for telephonic interview with HR and asked me to wait. He tried to convince me to not attend the interview, by saying that I won't be able to manage time for studies, etc. But I was so adamant and assured him that I can manage it. Then he sent me to the interview room. From the look on his face, I knew that they are going to reject me anyway. Then I attended the telephonic interview and waited for the verdict. The result was mark based, 30 out of 100 is pass. First they told the result for other candidates, everyone had less than 30 score. Then they said my score was 8 (lowest of all candidates) and adviced me to improve my English. BTW I forgot to mention, I'm a Freelance Invigilator for British Council. If they wanted to reject me, they could have just told that they don't want students and I won't be offended. I was told that my English is not good, but I was the most proficient candidate.