I noticed a charge on my credit card from "Mediazenn.com" made on 9-4-17 while we were away on vacation. I did not authorize this charge. I called their toll free number and reached an automated line that allowed me to "cancel" the account, for which I never enrolled. I had to enter my full credit card number and the system must have recognized it. I was sent a cancellation email. Now I have to wait to see what happens. I was charged $39.99 plus an international sercice fee from VISA of 0.32 cents.
If I don't receive the full amount back I will file a fraudulent activity report with my bank, and will receive the refund in that manner. Only problem is I'll have to once again cancell my card and get a new one issued.
I learned my lesson long ago on these types of issues. Check your bank statements often. I check mine online mostly daily.
Cheers