What option is the best to pay off your credit card debt, Payment plan? or Debt relief agency.?

I made a mistake, and Trying to get out off it. I Have a good APR on my AMEX (7%), drank my other 2 Is Killing Me 23% and 29% pretty high balances too. Almost am Paying $ 1000 Every month on the three cards alone, I Can barely save. PLS ADVICE