I made my first order on a credit card that expired the same month I ordered. I figured I was pretty safe even if it was scammy because they couldn't charge the card. A few months later I realized they'd been continuing to charge my card, so I called to cancel. The lady was super nice, refunded my money and cancelled immediately, no fuss at all.
I went back on their site a few months later and noticed it said I had credit to spend. I phoned into customer service and turns out they have no record of my cancellation; they've been charging me for months now. I asked for a refund and cancellation of my account, the woman said she could only refund 2 credits. I argued for a while then asked for her supervisor. I spoke to her supervisor who told me unfortunately she could only give me refunds for 4 credits. I demanded a full refund and argued for a while, then finally asked to speak to her manager. The last manager dealt with it, but I was stuck on the phone with them for close to an hour. The whole time they kept trying to convince me to stick with the program and buy more or try again one more time.