Talking to a sales person over the phone to cancel an appointment. I say:
Sorry, I would get the TV from you if I hadn't gotten scammed in the morning.
Sorry, I would've gotten the TV from you if I hadn't gotten scammed in the morning.
Are both okay?
Both are okay but personally I prefer "would have." It more firmly closes the door in the salesperson's face. "I would but ..." allows the salesperson to argue with you, whereas "I would have ..." indicates that the subject is closed, in my opinion.
I should also mention that "gotten" is no longer heard in BrE. We still use it in America, but I don't know about Australia or New Zealand. A phrase that would work anywhere is "been scammed."