While you are waiting for the business office to log in, you might look through the forums and see the many threads where somebody stayed an hour/day too long and their card got charged.
When that happens, and you lose the rent money, don't post here because we can't do a thing to help you.
The only way to get your money back is to write an email to support@chess.com. And don't expect an immediate answer. They usually take a day or two to get back to you.
This is my first time to have a trial.. i bought Gold monthly yesterday (1 september) and get 7 days free trial.. Chess.com also said that the trial will be charged on 8 September.
But the problem is that i can't do more tactics and lessons as the gold one offers.. anyone knows what's wrong? since i have no experience in buying a trial..