Complain letter Dear sir or madam

Complain letter
Dear sir or madam,
I am writing in order to complain about….

Firstly I am afraid that….

In addition////
I would like to hear your explation for the above problems.
Also if I do not hear from you before 3rd May, I shall be obriged to take matters a step further.
I inderstand that mistakes happen but it should be eliminated in time.
I hope the matters will be resolved quickly.
Thanks you in advense.
Your faithfully, Begzod Tokhirov!

Dear Sir or Madam,

I am writing in order to complain about….
Firstly I am afraid that’’’’’
In addition////
Problems,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

I would like to hear your explation for the above problems.

Also if you I do not hear from you before may 3rd, I shall be obriged to take metters a step further.
//
I untersand that mistakes happen but it should be elimated in time.
I hope the metters will be resolved quckly/
Thanks you in advense.
Your faithfully, Begzod Tokhirov.