[mothered]

can you explain me @mothered what you mean by boxing method

This:

Boxing means you send them back an empty package that you manipulated in a way that it seems like the contents have been stolen during transit.
You do that by making a cut on the bottom side of the package and taping it with a different colored tape than you used for sealing the package itself.

Do note that this will only work either with light items with a maximum weight of 120g
or with the use of dry ice. You measure how much dry ice you need to match the item weight and calculate how much time it will take to turn into a gas.

With both approaches, the package seems like it's been opened in transit. Because of the matching weight from the beginning of the return process, the rep will greenlight your refund.