Cons Call Home Overcharged, unauthorized charges, won't give me a refund nationwide

I signed up for their service on 12/31/13 and was charge a full month's rate plus set up fee. Then they charged me a full month's rate on 1/2/14 due to a "change in billing policy." I call a couple times and was told that I would receive a refund then I was told that I was not eligible to receive a refund. I asked to not be charged for the next month because I already had more minutes than I would ever use. They told me that I would have to cancel my account to avoid any other charges and that any mminutes left on my account would be lost. They refuse to give me a refund. They refuse to drop down my minutes or work with me in any way. Don't waste ur time or money with this company!!!!