Three or four years ago, I purchased a calling card from Just Phone Cards which I use to make long-distance and international calls. Around Christmas, it stopped working. When I dial the access number, I simply get a busy signal. The card has more than $30 left on it, but I can no longer use it to make any calls. I have emailed and called the customer service phone number provided by JustPhoneCards numerous times. They never respond. On my recommendation, two other friends had also purchased phone calling cards from the company. Both of... read full review »