Reminder: if your level of interaction with a service is putting your credit card in, the service is likely to interact with you at the level of automated emails, and also likely to trust you as much as someone who filled out a web form.

If it's business critical, talk to a human. All the cloud providers have account managers just waiting to talk to you. If this sort of thing happens and you have an account manager, they call you!

Even better, get a contract that prevents them from cutting you off like this, or sets an SLA for getting back online. Again, all the cloud providers will offer this, even for relatively low spends.