Use the suggested words and phrases to write complete sentences of a letter. 
Dear Sir or Madam.
 I/ write/ complain/ hair drier/ buy/ your shop/ last Saturday/ and/ treatment/ I receive/ when/ I try/ return/ a few days later.
............................................................................................................................................ 

I am writing to complain about the/a hair drier  ( which/that I) bought in your shop last Saturday  and the treatment (which/that) I received  when trying/I tried to return it a few days later.