Glitch in system caused me to be double billed for three years! When I finally noticed it, I contacted them to ask for a refund of the extra charges and was told they couldn't credit me back the extra funds. They admitted to seeing the error (charged via Visa card and direct debit through PayPal) but that "I waited too long to bring it to their attention. I even asked for a future credit and was denied that! An absolute failure on the customer service front...I feel robbed!