Dear Sankalp, after going through your post, I feel that this could be the recruitment problem. "For every job there is a person and for every person there is a job." Early exits or terminations show that there could be a mismatch between the person selected and the job requirements.
Organization's Culture
The second question is about your organization's culture. There could be a fit between the job and the candidate, and your selection could be right also, but what if the selected person is unable to conform to the company's culture? Therefore, the question arises, what kind of culture does your company have, and what efforts does your company make to give a specific shape to the company's culture?
Departmental Attrition
Thirdly, if there is heavy attrition in a particular department, have you spoken with the Head of the sales department? What are his views?
Feedback and Exit Interviews
Lastly, have you taken feedback from the sales personnel? What are their job challenges? Have you conducted exit interviews? What is the outcome of such interviews? How does the Head of Department treat the newly joined employees? How are the sales targets set? Do salespersons perceive that the targets are unreachable?
Note of Caution
In these days where social media is quite active, you need to curb these early employee exits. There are so many forums or portals available wherein ex-employees might express their negative views about the company. If this starts happening, then it could work contrary to the company's image, and problems could aggravate further.
Thanks,
Dinesh Divekar