How might you negotiate a resolution for this complaint?

Dear Manager,

On Thursday, I purchased a set of your maths textbooks, entitled 123 Basics, from your head office for the full purchase price as advertised in your latest catalogue.

The maths books are not what I expected. You were advertising that they are for basic maths, however, when we opened the books we discovered that they are for advanced students only.

I believe that you have put the incorrect cover on the textbooks or you have falsely advertised. I travelled over 100 kms to your head office so that I could purchase these books as they were no longer available from our local supplier. I am highly disappointed and expect a resolution.

I have enclosed a copy of my receipt.

I look forward to your timely response to this matter. Please call me if you have any further questions.

Sincerely,

Customer