Mislead by unethical collection practices at Citibank

I have never not paid my credit cards. I had a Citibank card with a great interest rate and transferred the remaining student loan debt to it. The balance is $12k. I lost my job back in October. And immediately enrolled in a DMP in December to make sure payments to creditors were paid. I struggled. Sold all my furniture and was still unable to find a job. I had to take myself out of the DMP in May, just so I could continue to eat. I finally found work, and the DMP re-enrolled me due to my circumstances, and all my creditors have been great. Reducing interest rates and taking me back. Except Citibank, they don't allow it because I dropped out in May.

The DMP advised me to contact Citibank directly. Citibank told me that I could make monthly payments of $300 and that I would be in great shape within a year. I agreed. After that first payment, I noticed $200 of it went to interest and fees! Shocked, I contacted Citi and begged them to work with me, and they refused. They cancelled the payment then AFTER they cancelled advised me that I could never re-enroll or make payments with them again.. (Thanks for telling me AFTER you did that).

I was mislead by Citibank and now I'm trying to deal with a creditor that I am trying to pay back.

Help!