I would definitely call them and let them know you no longer have service with them and ask for a refund of the money you have paid them since you haven't had service.
I would contact my credit card company and dispute the charge. They can issue a refund and stop charging you.
Maybe they are there, as you say, and stunned, but they withdraw money. You should urgently contact the representatives of this company and clearly explain your current situation. You can contact them by phone, by e-mail or via fubotv customer service (https://fubotv.pissedconsumer.com/customer-service.html) and I think your question will be resolved soon. Or do nothing and pay further.