The shipping method used by the seller to send the product has clearly indicated on the ebay listing.
As a buyer, he has several opportunities to see what kind of shipping methods the seller will use before placing orders and during process the orders.
If he has special requirements for shipping, he can also contact the seller before placing orders to see if seller can meet his request.
But he did not do it at all, but contacted the seller after the seller had shipped the package and told the seller that he needed the seller to use other shipping companies to send him the item.
The seller made a reasonable explanation and told this buyer that the parcel had been sent and could not change the shipping company. The buyer immediately opened a case and left a bad review. And argued that he was not at fault. SO SHAMELESS.

The bad buyer report organization found this case and confirmed that there was no problem with the seller's handling in this case. However, sellers have encountered unfair complaints and bad reviews. We have contacted ebay and exposed the buyer’s behavior.