FreedomPop bogus charge of $9.99 a month, partial refund only Los Angeles California

I received offer of free Internet from FreedomPop about 16 months ago.  I ordered a wireless device for a minimal charge and it arrived in a timely manner but I could not get it to work or to get their software to work.  So I called to cancel the service.  This month I noticed a $9.99 charge on my credit card bill from FreedomPop. But it was much worse -- I looked at past statements and found I have been paying this $9.99 for nothing since June.  I called FreedomPop and received minimumal satisfaction.  They agreed to stop the charges, but would only refund three months!  I still don't know what I was paying for -- sales rep tried to explain but I didn't understand what value I possibly derived from them.  She also said I should have canceled the service when I was first charged in June, but she could not tell me why the charges started in the first place!!