Gpnetpcs.com Fling.com They have been charging my bank card for charges I did not agree to. Internet, Internet

I began getting charges on my credit card after I signed up for a dating service at cpdnethelp.com.  The charges have been extravagant and I closed my account with them.  Low and behold, not all the charges were from cpdnethelp.com, the were from gpnethelp.com.  In the last few months, they have charged over $300 to my account without my permission.  It started around the same time as when I signed up with cpdnethelp.com so I assume gpnethelp.com somehow tagged along with my order.  Although I canceled the cpdnethelp, the charges from gpnethelp did not stop.  I am now having trouble stopping these charges and I would like to get my money back due to the fraudulent nature of these charges.