SkinnyMe Chocolates Will not cancel subscription Internet

First, they subscribe you to their delivery service with making it clear that's what they're doing. So I call them using the phone number that is all over their website. It isn't their number! It goes to a cable company. So I email them asking them to cancel. They email me back saying that cancelations can only be done over the phone. How can I do that when they won't give me a phone number that actually gets to them? The only way I can prevent getting another box is to change the "next shipment" date. I don't really want to do that for the rest of my life because they won't cancel the subscription!