We used Constant Contact software to design an online store for a 12 Day holiday event. We warned tech support that we expected a high level of volume on the first days of the sale and were assured your servers could handle it. In fact, the high volume could not be handled by your server, and the program failed from the first day. It was a 12-day nightmare! The "tracking" of stock failed; customers were not able to move to check out during high volume periods, and therefore, we oversold on many items. We had to refund many customers and lose all those processing fees! It was a mess! We spoke numerous times with your tech support who acknowledged the problem. In the end we were told "We can see the program failed, and we don't know why!" To be told that and then not offered a refund or a credit on our subscription is unacceptable!