US Tech Support Will not give refund Internet

On September 17, 2014 I called  USTech because my computer was running extremely slow. At that time they informed me that my subscription had expired and it was $479 to renew for two years.  I charged the $479 to my Visa card and subsequently the technician checked my computer,  stated that he had all the issues resolved.

The comkputer continued to run slowly never the less I was on the computer October 29, 2014 and a popup telling me that several directories were outdated.  I called that company and the technicial began to examine the computer.  He immedicately saw that I had 15 people that had access to the computer via spy ware, and that I had 6985 directory entries just to start!   Also, no protection was offered for internal or exterial viruses or spy ware etc.  At that time I paid $379 one time charge for the company to fix my computer and $58 to the internal and external protection and I could contact them at any time.

This moring I called USTech to request a refund since  thay were not providing the service I thought they were, and that  I had used the service once when I renewed the service, and I had more than a year and a half left.  They charged me $479 for a service thay had not been providing.  I spoke to the representative and she said I could not get anything back since I had exceeded the on-line assistance.  What? I used it one time?  Then I spoke to  the a manager and he told me the same thing!  I am a senior citizen and cannot afford to pay over $800 for secure my computer.  All I wantefd is a prorated return of my money.  This is a BIG repoff and I'm sure it has happened to others.  I hope you can help, I am contacting our attorney general,  and the better business bureau also.