To speak generally, an immediate ban—as you sensed—is hugely unlikely to happen to a regular member.
We do communicate our decisions privately and publically, and even if someone were to post serious illegal content, we'd probably want to keep the account open for legal reasons.
Assume a technical hiccup in almost all scenarios. Use an alternative location to log in from (friend's house, work, café) and contact us directly by PM.
Although they're sometimes the origin of the problem themselves, simply changing from wifi to mobile data on a phone might allow you to log in ane alert us to the issue.