How do I get my account information from them?

I received a call from them about two weeks ago and they said everything written on this page to...me and They were supposed to mail m esome info in the mail and I have yet to received a letter from them. I am so stupid because I give them my card number and pay them as well as set up an arrangement with them. How do I get out of this? I should have done my research. Help!

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