I subscribed to Primus long distance phone service because they promised no extra fees, only charges for phone use by the minute. Without notifying me they changed the terms of our agreement and started charging a monthly fee for low usage. Low usage at no extra fee was why I chose their plan. When I asked for $90 in unauthorized charges to be refunded they refused, and threatened to ruin my credit rating when I disputed their overcharges with my credit card company. They have initiated collection agency harassment of me now.