[ruonis55]

Last time I did Steam Deck refund it was with EB. If that doesn't work I would do chargeback. Steam doesn't reply to chargebacks.

Paypal for shure, do you think they also didnt respond to CC chargebacks?

You answered the question yourself. Nowhere they respond to chargebacks. Your Steam account will be banned/restricted for doing it.

Last time I did Steam Deck refund it was with EB. If that doesn't work I would do chargeback. Steam doesn't reply to chargebacks.

But in case they respond they would have all the proofs to win the chargeback since the op has turned on and linked the device with the same account/details used for the order.

Author did the first mistake by turning the device and didn't receive the refund for claiming DNA. He doesn't have many options or just claim as lose and sell the Steam Deck.