AT&T
Charged me over $55 for a non-existant "service call" after I complained about a bad phone connection! Ripoff!
When I complained to AT&T about a bad connection with my phone service (lot's of static), they said that they would "check on it" and that they would "get back to me, " but they never did get back to me. To add insult—and shock—to injury, my next bill was up by $58 ...