Just a couple of questions first before we can try to help you:

Have you contacted your bank/credit card issuer about the fraudulent charges? If so, what did they say?
Where in the world are you based?
Does Gisol own your domain name(s)?
How did Gisol cheat you out of the money? ie did they quote you a small amount at renewal time?

Please leave as much detail as you can. Thanks.