What is ClassDo’s pricing like? How can I try out ClassDo? Is there a free trial? How do I purchase a subscription plan? I am an existing customer. How will opting for a subscription plan affect my unused paid hours left from my previous top-up? Can I continue using my previous Pay-As-You-Go plan or bulk purchase package without opting for monthly/annual subscription? Can I add more educator seats midway through the billing cycle? When will I be charged for my subscription plan? The payment for my subscription renewal was not successful. What should I do?