Core Institute sent me a bill for a service that the insurance company has paid for. I've called, emailed, written certified letters, filed a complaint with the BBB, to no avail. They admit that I'm due a refund and that it's in process, but I paid them in October 2014, it's August 2015 and they still haven't issued the refund. Each time I talk to them they say it's in process and they'll try to expedite it. It's been 10 MONTHS. I finally received a refund check from the Core Institute on September 12, 2015.