I believe I have been scammed by a false job offer?

You should contact your local authorities first. If you are protected under the law they will take care of it. But if your not, keep an eye for your balance, credit score and spending. make sure that you are not being charged for something you did not purchase. If something seems suspicious and you are not protected under the law you should gather a number of people who have been scammed by that company and turn it in to a local judge of authorities.