Brace yourself for minutes-long menus that give option after option that don't apply to your problem and simply repeat the same choices over and over. The hold time jumps. The customer service reps are apparently instructed to repeat the same lines no matter what you ask, no matter how much you try to get information other than what they are told to say.
Every time I attempted to do something online it told me "unavailable."
Of course, they can get away with the most inconvenient service since what are you going to do, say, "cancel my electricity?"