Thank the interviewer(s) in person, by email or by post. Common courtesy and politeness goes far in interviewing.
Don't speak negatively of former coworkers, employers or colleagues.
Keep wording professional at all times.
Remember the importance of body language such as eye contact, posture, active listening and nodding.
Job Hunting Tips:
"Upon exhaustively studying likely professions/positions, distinct career selections will develop as the most authentic and interesting for you, personally. It's possible that no one career path has the possibility to employ every one of your qualities and have a code of ethics that is in sync with with your very own."
These things would probably help you to get this job
Proven sales and/or telesales experience
Consistent sales record demonstrating capability of building and sustaining sale pipelines over time