Slimdown Slimdown unauthorized credit charge 2 twice MD Internet

About a month agon around the same time on the 16th of august without my knowledge or consent a 49.95 charge was made to my credit account and was pending at the time.  I contacted the people who charged my account first and explained to them that this was not a charge that i had made and that it was unauthorized and i wanted my money back.  They tried very hard of course to convince me that I did make the charge (trying to not only keep my money but charge me more by attemping to sell me their upgraded package) however I was adament and they refunded the mony a few days later after it posted on my card.  Now a month later after i had already explained to them and canceled my alleged account with them and got a refund, on 9/16/14 another charge pending for the exact same amount 49.95 but this time under a differnt description name called Slimdown.  After this I was feed up and i contacted my credit card company and had them cancel my card, but not before they were able to tell me that the charges from a month ago and the charge that happend yesterday were made by the same people.  according to my credit card company it appeared to be some sort of subcription charge that i know i did not sign up for.  So beware if you ever get a charge like this and cancel your card immediately as it wont be the last time you see it.