Pctools Spyware Doctor, Registry Mechanich PCTOOLS fraud making charges to credit card Internet

I live in Mexico, have a Mexican Credit Card and even having NOT used any service offered by PCTOOLS ever, I've been charged on my credit card for 40usd. The first time that has happend was on Jan 29th 2009. To close that issue I went to my bank and claimed on internet fraud, the money was replaced back a few days later but my surprise was a few minutes ago when I just review my Credit card charges of the month and found out another charge from "WWW.PCTOOLS.COM 18007645783" for $40 usd. That is when I look for my files and found out the similar fraud charge a year ago. Please do not trust this company and make all the possible to stop this internet fraud, I don't know how.

I wonder how do they have my credit information even having not used their services, of course they have access to that information from other stores or simply spyware (something they might be experts). Be careful!