The billing and payments online are a user's nightmare. I have wasted at least 3.5 hours this week trying to pay a past due balance. The work credit card was canceled and I'm waiting for a new one. I tried to pay with check and couldn't. Spoke with billing was told I could pay by check if it is annual. I changed to annual and wanted to pay over $1,000 right this minute. Still can't pay. FYI- I will use my personal card to pay the past due balance and then leave Constant Contact after this cycle.