Most (though not all) of my problems with Verizon were billing related, their robots automatically charging me for services or time that I never used.
Then, after long waits on their automated customer service line, Verizon would promise to credit me the full amount -- and then not do it.
Now -- after not hearing from Verizon for nearly one peaceful year! -- Verizon has begun emailing me a "monthly bill" of $46.62.
Verizon is truly retarded! I have no wireless account with them. Yet they keep on billing, long after I've kicked them out of my life.