NEP Products ripoff, continue sending and charging for product after cancelling with them Sherman Oaks California

I ordered product from the company was charged and then canceled after paying for the inital shipment. I e-mailed them upon canceling my membership to which they returned an e-mail confirming my cancelled membership.
I received in the mail a month or so later another order to which I returned unopened.

I just recently received another shipment and am sending it back.

I have called to confirm that I no longer wish to receive their product but all I get is a run around.
I have yet to receive my bill from my credit card to see if more charges are on there from them. I will be notifying them also to this problem.

Nazario
Madera, California
U.S.A.