Is there any way to refund a skin?

Due to the lag problems with the store I ended up buying the same skin 4 times by mistake. The thing was that I clicked on buy and the game told me to try again later, by the time I realized (and let me open the list of items purchased through the store) I had the same skin pack 4 times.

I have obtained one of them, but I would like to get back the gems concerning the remaining 3 skins, why would I want to buy the same skin 4 times?

Has this happened to anyone, is there any way to fix it? I’ve tried contacting Amazon support and they tell me to try to process it through steam and in steam they redirect me to Amazon support… seems pretty disastrous management to me.

If someone can help I’d appreciate.