We sincerely remind all sellers. Please do not make any transactions with this buyer. Immediately put him on your blacklist.
He is not sure whether the product is suitable for his equipment. did not consult with the seller before buying. And placed a purchase order directly.
After that, the product did not work properly, and in the process of communicating with the seller, he kept avoiding responding to the seller's key questions. He insists that there is a quality problem with the product ( only God knows if he is telling the truth ).

The seller chooses to bear the loss and explains that the seller can provide him with Return Label（Seller will pay for the return shipping fee）. Let him return the product to get a full refund.

However, he refused to return the product and said that he wanted to give the seller a bad review.

The seller has done all that should be done, after our observation. The seller has no fault. The buyer is likely to be a repeat fraudster, and the product he got is likely to have no problem, so he just wants to get a refund but is not willing to return the product.
No seller can guarantee that the product will never go wrong. If there is a problem with the product. The seller should pay the freight and let the buyer return the product and refund it in full. If you do business with this buyer, you will not be able to retrieve your product, you will bear the loss of money and will get a bad review. Tell everyone again not to make any transactions with this buyer.