Whatever you have to say about Judas Iscariot, at least he got paid something.
By the way, how much were you paid the last time you betrayed your friends, your values, or yourself?
Despite this, the trade is made. The debt is paid. The payment is collected. The effort is exerted and cannot be returned.
Life unlike the vendor has no cashback policy. Items sold cannot be returned, irrespective of conditions on delivery.