Cheated by Cingular CSR - what shall I do?

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I received a phone call yesterday from a Cingular CSR. She tried to sell wireless and when she heard I got one already she found a great offer for me. It was really very good, including no contract, 29.99$/month, plus a new camera phone for free. I wasn't deciding immediately as I wanted to ask my husband. Therefore I got her 1-877 number and extention to call back in 5 minutes. This time I asked her to check again if there is any contract to sign up and she said NO immediately. She then checked for me and told me there is only one time 9.99 shipping fee for everything. Today I found out it is all wrong, because in my email there is an order with a large bill, including a 2 year contract with 39.99 plus/month, a 35$ activiation fee, a 39.99$ cell phone fee, and a 9.99$ shipping fee (plus about 20.00$ tax and handling). I tracked immediately and too bad the phone is already shipped. I am feeling cheated and very upset. Much worse, in their email, I will have to pay for an expensive tracked shipping to return the stuff. I really don't want to pay either way. What can I do now? Please help! Any suggestions are welcome and very much appreciated.