The same order was sent twice, but the result was a bad recommendation rating and complaints

[quekuangshan]

About half a month after receiving the package, the buyer sent a message telling us that the projector could not be turned on after being used twice. We asked the buyer to send a video to verify whether the projector was damaged. The buyer replied that he did not understand sending videos and asked for a new projector. However, the buyer complained again yesterday after receiving the new projector. After sending several pictures, he said that the projector image was not clear, the base was damaged and other problems, and gave negative comments not recommended. So we negotiated with the buyer to solve the problem, and the buyer requested to send the product for the third time, I know that I can't send it again anyway, may I ask how you can solve such problems? I would like to thank you all for your suggestions on this issue