The very first thing that I would do is to initiate a chargeback complaint with your bank and credit card company. They can do this immediately and your bank will provide you with the forms and instructions.
I would then file online complaints with the Federal Trade Commission at https://www.ftccomplaintassistant.gov/. I would also file the same complaint with your state attorney general and the ag for the state where the website lists as the home state of the company. You can find this online complaint portals by "googling" the name of the state and the phrase "attorney general consumer complaint".
Those are the four best steps you can take to get your money back.
Please let me know, if you have follow-up questions.
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