MARKETINGSOFTSOLUTIONS BAKU hacked into my computer and forced me to purchase a virus protection because it said i was infected with viruses Internet

I was using my computer when I was assaulted with a scan tool that reported my computer was infected with a trogan virus.  My system locked up and a screen appeared covering my whole screen.  I was not able to scan my system for viruses or spy ware as I had no control of my computer.  I was then (on screen) given an option to clean my system or purchase a virus tool priced at $59.95, $69.95 or $79.95 and my swystem would be cleaned and virus free.  I tried for 2 hours to scan my system to no avail.  I then felt hostage to the virus and paid the fee of $59.95.  My system immeadiatly cleared and all systems were normal. I did not receive a download or icon for my computer nor was I givin a website or address from Marketing Soft Solutions.  My Bank account was charged $59.95 and I am currently disputing the charge due to the fact that I was not given the option of buying the software voluntaryly.  I resent being strong armed by being forced to purchase an item I have no knowledge of or option to decline the product.