I hereby tender my resignation from the post of (Secretary to General Manager).
Here, I wish to bring to your notice the (unwarranted harassment of the General Manager). I am sorry to inform you that all my earlier complaints to the higher authorities in the organization fell on deaf ears.
Under the circumstances, I am left with no choice but to tender my resignation and move on.
I look forward to better co-operation from the organization in clearing my dues and relieving me of my duties by the end of the week.