Refund for a product from apple store?

I bought a airpod 1 last night at apple store in Taipei101, Taiwan.

But I found airpod 2 right after from another store so I didn't open the first one.

Didn't even open the wrap.

But the employee refused to refund though I brought the receipt.

She said it is apple policy that only ones purchased from apple online store and 're-seller shops' can do the refund. Apple offiline store only can do exchange or technical support.

I found this very hard to believe cuz there is no benefit of purchasing new product from apple store according to her theory then.

How come I can't get the refund for the product that I didn't even open?