I upgraded it to paid plan.
Please stop blocking
You asked this via email, too. We responded there. But since you've asked this here too, it might be good to cover this here for other people who get their account removed.
We remove accounts for multiple reasons. Violating the terms of service is what it all boils down to. Creating multiple free account, using disposable email addresses, fake names, etc. are all things that will get account flagged and then removed.