Dear Sir or Madam,
I am writing to complain about my new TV-set, which I bought in your shop 'World TV' two weeks ago and the next day the screen went blank. This TV-set is small and black.
In fact, I have already writted to you about it, but unfortunately nothing has changed. I must express my dissatisfaction with this situation.
It is very important to me because I use this TV-set very often. Without it I cannot follow the political events that I need to write a thesis on. This lack of a barrier to my work on this.
In this situation I am afraid I must ask for refund or change of the item.
I look forward as soon as possible to hearing from you.