Can I refund humble bundle?

How to refund a game on Steam: Tips to get your money back

Humble Review

How do I request a refund on an asset? – Unity

How to Refund a Game on Steam & Get Your Money Back

Why Am I Receiving an Unknown Key/Order Canceled Error? – Humble Bundle

This looks like a scam : r/humblebundles

Humble Bundle: Harmonic Hauntings

Steam refunds: Does Valve win either way? - Polygon

Humble Bundle and One Order Too Many – Medo's Home Page

GMG is offering refunds for those unhappy with the lack of pre-order bonuses on the PC version of Dead or Alive 6