Write An Application To The HR To Complaint Against Manager In English

To, 
The HR Manager,
Ekon Designs,
Hoshangabad Road,
Maharan Pratap Nagar,
Bhopal- 462011

Subject-Complaint against manager.

Respected Ma’am,

Before I delve into the purpose of this letter, I would like to bring to your attention that I have been a diligent junior designer for your company for about 4 years now. 

Mr. Prashant, who is my manager, has been greatly biased with me. He withheld my promotion on the grounds that the company was low on funds. However, just this week, he promoted another employee, my junior to the position I was eligible for. The junior has no experience or expertise required for the role, he only got the promotion because he is Mr. Prashant’s nephew. I am greatly disappointed with his extremely unprofessional behaviour. He is not only hindering my progress but the company’s as well.

I urge you to look into the matter. Awaiting a favourable response.

Thank you.
Sincerely,
Ziva Sanon
Plot 5,
Vani Road,
Shanti Nagar,
Bhopal- 462011