Dear Sir or Madam
  I am writing to complain about equipment that 
bought
 from your company as a fridge, virtually a week ago. It's model name GMR5 and I Add a missing verb
was bought
was assure
 by the seller that the refrigerator Change the verb form
was assured
in
 perfect condition.  Everything was fine but it suddenly stopped working. I noticed that the equipment was not working properly from the temperature. 
   Since I didn't have enough money, I created a bakery from home. And naturally, I needed a refrigerator so that the products would not go bad and Add a missing verb
is in
last
 a long time. Linking Words
As a result
 of itLinking Words
  was 
not working well, many cakes became inedible, Unnecessary verb
apply
not to mention
 Linking Words
that 
my customer's complaints. After these events for a few days, I started having serious headaches and my productivity decreased substantially.
   I would be Correct word choice
apply
gratefull
 if you could give me a full refund. And I would like to request that you cooperate with companies which have Correct your spelling
grateful
a good qualifications
. I deserve an apology and Correct the article-noun agreement
good qualifications
a good qualification
an 
appropriate compensation for the inconvenience caused to me.
Yours faithfully
ShodiyonaRemove the article
apply