I had the same problem. I was having a minor difficulty with my "free download of Limewire," only I only paid for one year after they finally offered me a free trial. MyMusic.com didn't want to give me the refund, but after multiple threats and reminding them of their free trial offer, they relented. When they asked me on the "request for refund" form, I told them exactly why - they were a scam and that I could get the same software free anyway from the original legitimate site.

So, just keep at them, they'll give you your money back. Report it to your bank and/or credit card company and tell them you did it.

Worked for me.