As per paragraph 13 of our terms of service to which you agreed when you signed up, “[FaxBetter] will automatically charge your payment method for your service charges whether monthly, yearly or otherwise, and any applicable fees and taxes, after the last day of the period in which you prepaid unless you had canceled at least seven (7) days prior.” Additionally, “All service fees will be charged in advance and are not refundable. If you cancel during the term in which you paid, your service will continue through the term paid. No prorated refunds will be given under any circumstances.”
If you cancel now you will not be charged again when your term expires.