How do I get the marketing company who overcharged and bill padded to reimburse me?

I hired a marketing firm to list my brand on amazon. They charged my credit card $33,000, a significant portion of tasks i didn't approve. On the email they send, there is fine print that says if the tasks are not approved by the client then by midnight they are automatically approved. Very dishonest. They increased the time per task to get hire fees. The work was subpar and very sloppy. I asked them to reimburse me and they wont