I'm having exactly the same problem, I didn't cancel in time, had another shipment sent - paid for it - my fault. But then, AFTER I called to cancle future shipments, which they said was all handled, I just received another shipment yesterday. I'm trying to call to sort it out, and wait, and wait, and chose the option to have them call me back, they say you won't loose your place in line. They've never called so far, it's been, close to 12 hrs. now.
If I have to, I'll contact my credit card co., I'm very unhappy, this stuff is expensive and I want it to STOP.