We got 2 story reported about this buyer

Story 1，
The buyers have been making fun of the seller，he will buy a large quantity of items，and refuse the package when it arrive，and tell seller he did not refuse the package，let seller to send again，seller sent again，he refuse again. The shipping company confirmed that it was rejected by the recipient himself and stated that he did not want this thing. Even item is free shipping, seller still need to pay shipping company to ship the item,if the package get returned,shipping company will charge extra shipping fee. This buyer play seller twice,and waste seller's time and money

Story 2.
This buyer use some weird transhipment company to transfer the item to another country（use same country address as seller's country to place order，but that is transhipment company warehouse address，then transhipment company ship to buyer's address in another country），However, the item he purchased were not accepted by the transfer company（Embargoed product type of the transshipment company）, so the transhipment company refused to accept the package and return to sender.
This buyer blame the mistake on seller,and left unfair negive feedback to seller.

So block him, Don't be deceived by his seemingly large number of orders and consider him to be your big customer.He is actually just wants to play you.