So far I had been quite happy with the traffic adcenter has delivered. But recently I had an extra $500 charge in a 4 day period that was out of the norm for my account. There is no record of the charges in my stats or adcenter reports, yet they billed my credit card. I opened a ticket on 1/11 and have made 3 follow up phone calls. They still have not given me an explination or even offered to credit my account until they can show me where the charges came from. Anyone else have problem getting MSN to respond to billing issues? Is it time to switch back to Adwords?