Read the formal letter, and then answer the question.

891 River Road
Chicago, IL 60654
August 25, 2019

Tallow Company
56 Pebble Drive
Richmond, Virginia 22213

Dear Sir or Madam:

I purchased the ReadyBot last month and was excited when it arrived. For the first couple of uses, it worked exactly as expected, but it broke the third time I used it. I managed to fix it, but this has been a recurring problem. I purchased it from an online retailer that will not reimburse the money I spent because I have owned the product for more than 30 days. This is simply unacceptable. I have included a negative review of the ReadyBot on the website and will never purchase a product from this company again.

Sincerely yours,
Pete Wilson

Which best describes the purpose of this letter?

to make a complaint
to provide feedback
to request information
to make an introduction