There is no refunds for such thing because the mistakes came from your own side.
1. You realize very well that using iPhones may makes the site looks not as good as the original one. It does mobile friendly, at least it works fine on mobile android browser. Indeed most buttons as close to each other so players are responsible for this possible miss-click.
2. You have played several times on the blackjack and I believe you notices that there is no features like what you mean "are you sure..." when you hit the Double button. So you cant complain about it after a lose bet with real balance. You should always try the game on any sites to see the full features of the game.
3. Support cant help any players in case of miss click. Once you make a bet then nothing cant be changed no matter you push wrong button or not.

All in all, if you get a refund of such kind of accident then most other players will do the same by creating a story of miss click to get a refund once they lose their bet.