Need help canceling an order

Hey, I can’t reach human support. I accidently ordered a whoop band and can’t seem to cancel the order. Please help.

Edit: The band is apparently now on it’s way. If I keep it I would at least want to use my promo code (which was the reason I accidently bought the band, looking for the promo text box). Would that be possible to get the amount of the promo code payed out in this case? Otherwise I see no other way but to return the band.