Deciding to cancel a cable service subscription can be difficult -- breaking the news to the cable company can be near-impossible. Tech journalist Ryan Block and his wife Veronica Belmont tried to cancel their Comcast service last week over the phone. Block says 10 minutes into his frustrating conversation with the Comcast customer service representative, he started recording the phone call, which he posted on SoundCloud. The representative, whose name Block withheld, repeatedly demanded to know why Block would want to cancel the service. Block tells WTOP he and his wife told the representative they wanted to change providers, before...