|Many applicants are advised that the more they get the interviewer to talk, the more the interviewer will like them. There's a good deal of truth to this adage, but it sounds like your applicant went over the top in applying it. |
The real problem is that this applicant did not listen. You clearly told him to hold his questions, but he rejected that suggestion and continued down his interrogatory path. And, if he doesn't listen to you during a job interview, what does that tell you about the way that he will act if you hire him?
While asking questions is extremely important in a telemarketing position, it is just as important to listen to the answers. Questions help a salesperson identify the prospect's needs and then adjust his or her presentation to meet them. This applicant sounds like he was only interested in getting you talking, and not in what you were saying.
If you still feel that he would be a good addition to the team, bring him back for another interview. Regardless of the first interview, second interviews are very helpful ways to get beyond the initial superficialities. Give this applicant the ground rules of the interview, and then see whose rules he plays by.