If you don't pickup the phone call, their auto dialer will most likely call back again later. In order to not receive anymore calls, you simply need to follow the prompts to remove your phone number from the callers list while on the original phone call or call back the caller's phone number. If that doesn't work for you after 2 business days of your request not to be called and/or if you'd like to speak to a live person call 307-223-0458 or 877-646-7319. I did it and it worked.