Unsuccessful card payment after many different tries

Hi, I'm reaching out because I've been trying to purchase Minecraft for mac or java and have been unsuccessful. I have exhausted all of my resources, called the credit card company and used other credit cards but still get "error" upon transaction. Updates are up to date, I've tried chrome, I've tried incognito and nothing works. I reached out to the support team several times and it was quite unhelpful. The last person prompted me here, I have just been trying to buy the game.