NetZero REFUSED TO CANCEL MY ACCT, Internet

On August 12, 2007 I signed up for NetZero internet service at my college apt using my dad's CC.  Immediately after signing up I recieved a conformation email which stated that NetZero required a dial-up connection.  I didn't have phone service.  Nowhere on the website when I was signing up did it state that the service was dial up.  I didn't know.  WHen I found out, I emailed the company asking them to cancel my service immediately before my dad's CC was charged because I didn't have a phone line to use.  They emailed me back and stated that they couldn't cancel accts over the internet, it would have to be over the phone. 

So on August 14, 2007, I called and canceled.  Supposedly.  I didn't notice that they were still charging me until January 21, 2008, when I emailed them again and asked if my account was canceled.  They responded saying I would have to call.  So I called.  The account was in fact NOT cancelled so I told them that they needed to do so ASAP and credit my dad's card.  Time went by and I forgot about NetZero as the CC wasn't mine so I didn't read the stmts.  A few weeks ago, my dad called me and asked why I was still using NetZero as he thought I'd had problems with them in the past.  We came to find out that NetZero had continued to charge the credit card the entire time (OVER TWO YEARS) even though I had called and cancelled TWICE!!! 

What more do I have to do to get this over with?!  So my dad called NetZero and told them that we wanted the service cancelled asap and to stop charging his CC.  He cancelled his CC as he didn't trust them and, of course, last week I recieved an E-Bill from them asking for a payment as the CC wouldn't clear.  I CALLED THEM AGAIN, TODAY, and asked them to send me a confirmation that THIS TIME IT HAD BEEN CANCELLED.  I will never do business with them and I would strongly recommend that no one else does either.  I asked to speak with a supervisor and she told me that she had no record of the phone calls.  Isn't that convenient?  This time I was smart enough to get a cancellation reference # 044582448 so I have it in writing that it was done.