There is a way to request refund, but your request for refund could be rejected. I don’t use an android, but I saw for google play store, there is a refund policy for 2 hours. I don’t think you can get a full refund after two hours for android. But for app store, the refund policy is only up to 90 days. You could get a refund on app store and if the refund does happen, the skins or heroes you bought by diamonds would be locked.