How to buy books in Confucius' old book network? Experienced please come in!

I had an unpleasant experience for the reference of book buyers: The New Edition of Chinese Teaching and Learning in Junior High School in 212-Reading

After receiving the book, I didn't read it carefully in time, and the seller called to confirm it, so I confirmed it. This is a major negligence. A few days later, I found that the exercise place in the book was full of handwriting, which was not comparable with the original price of 3 yuan and the current price of 15 yuan. If you didn't have a full piece of homework and handwriting on it, this statement is feasible, and now it is obviously not the "Ninth Five-Year Plan" product you described, so I propose to return it.

The intermediary reply received is as follows:

According to the Administrative Measures on the Protection and Use of Intermediaries of Confucius Old Books Network (Trial) and Related Instructions III. How to deal with the dispute over intermediary protection of Confucius' old book network? 1.? The buyer can initiate a complaint at any time before the online operation of "confirm receipt" or the system automatically confirms receipt, and then no complaints other than "malicious evaluation" can be initiated. ?

in view of the fact that the buyer of this transaction has already confirmed the receipt of the goods, please settle the matter through friendly negotiation, and this complaint is rejected.