Has that ever happened in practice? I find it very hard to believe that a company normally so desperate for new business as to spam people with sales calls and

Has that ever happened in practice? I find it very hard to believe that a company normally so desperate for new business as to spam people with sales calls and lock people into contracts (to make sure they can't leave once the service ends up being sub-par) would suddenly start saying no to people's money and cutting them off based on a technicality.