Its unimaginable what you are asking here. Think about it. You ordered a product that cost about the same price as 2 starbucks coffees, had it shipped from one side of the world to the other, you couldn't be bothered to pick it up, it was sent back to the other side of the world. You also imaginably had multiple people spend their time on it, packaging it, sending it out, looking into the complaint, responding to the complaint, etc.

I'd say you got your 6.42 worth, especially considering that the product was available at your local post office. Apparently they feel the same way as well.

They don't make huge margins on this Chinese junk like Amazon does so you can't expect to be able to order and send stuff back and get your money back. Amazon can afford to do it because all sorts of suckers overpay for their Chinese junk.