what do you do with really bad customer service.....

I had an awful experience with my cell phone company....to make a long story short, they stole my money, then wouldn't rectify the situation until I had made over 25 calls in 5 days, was on hold altogether more than 7 hours, was transferred from one customer service representative and/or department continually, was told my problem would be resolved in one phone call, talked to reps in 5 states, 3 countries and had to have a friend of mine help make the calls to get my money back!! Eventually I just told them to cancell my account and they seemed to have a problem with that and finally solved the problem, re-imbursed my money and gave me one heck of a deal to stay with them. If it happens again, or another BIG problem....I'm outta there!!