You had a summer internship at a marketing agency last summer? Or was it at MTN, Microsoft or McKinsey? Great! So did everybody else. The fact that you had an internship is not impressive, it’s what you did while you were there that is (or isn’t).
Students have accepted this false notion that even if you’re just answering phones, the fact that you had some big company’s name on your resume will get you a job. It might get you in the door for an interview, but if you can’t share the benefit you provided to the company, you won’t be seen as a valuable resource.