Bad service

Our internet line has been down since the 18th of Jan to date it hasn’t been fixed we’ve been calling the service provider continuously for feedback and there hasn’t been any since. So what we decided to do after a month is to cancel the service seeing that it’s not being fixed there’s no point in paying for the line. I called early March to cancel but now we are still billed for the month of April but the line has been down since Jan so we’ve been paying them since for no service for the month of Feb and March now we billed for April too that’s not fair.