This is the only question that I see for you, but if you are sure that it was this site that charged you, perhaps it under a different account. As an independent contractor I do not have access to billing information, but I can provide the I contact information for customer service so you can contact them and request a refund for the original question.
Phone and chat options available at ww2.justanswer.com/help
I will do my best to resolve the problem with Internet Explorer and Windows 10. I have verified on my windows 10 machine that I have Internet Explorer available to me as a choice. You may need to uninstall Internet Explorer, reboot your machine, and then reinstall it, if it isn't showing up as a choice when setting the default browser.
If you'd like, I can offer the PREMIUM SERVICE of a SECURE REMOTE CONNECTION. This will allow me to see exactly what is happening on your computer and to work on the problem while you watch. This is completely optional. If you do not choose to take this service, I will walk you through a solution step by step here. A SECURE REMOTE CONNECTION is usually $39, but since you've had a less than ideal experience thus far, I would be willing to offer it for half of the usual price. If you'd like to do that just let me know. Otherwise, please try uninstalling Internet Explorer, rebooting, and installing again. Please keep me posted.