Writing Feedback / 'dissatisfaction with the house' ; IELTS TASK 1 [14]

My english is very poor, sorry for any misunderstanding and thank's alot for correction
----------------------------------------------------------------- ----------Topic
You are not happy with the work a home builder does to your house. Write a letter to the manager of the company. In your letter,

1. Say who you are and why you are writing
2. Explain the details of the work that you are unsatisfied with
3. Give suggestions on what you think they should do

----------------------------------------------------------------- -Essay
Dear Sir or Madam,
I am writing to you to express my dissatisfaction with the house that you have completed last week.
As you may know, I am the owner of the house. The poor quality of the house makes me very disappointed. In the first place, one of the new doors in the living room is in very poor condition and has a broken handle, which makes me impossible to get into that room. Besides, the color of the walls was not the same as the one that I saw in the initial plan.

In addition, I tried to phone your office and spoke a staff, a Mr. Robert, who was rather rude on the phone and informed me that I cannot get neither a replacement of the door or a new color of the walls.

I understand that, as a member of the management team, you have the power to solve these problems. I would, however, be perfectly satisfied if you would kindly change the door or repaint my walls, whichever is more convenient.

Yours Sincerely,
Shigang Xing.