It's important to keep in mind how many problem users there may be. Trolls can create millions of accounts, and to respond thoughtfully to each one would require orders of magnitude more manpower than the trolls themselves. So every service needs a bulk insta-perma-ban hammer for large-scale trolls. Twitter is banning accounts by the millions in order to make a dent in the trollage.

Sadly, there will be false positives. Legitimate users that get mistakenly banned need recourse. Traditionally, your recourse was through the law. But courts are so slow and inefficient that it takes months and thousands of dollars to get even the simplest thing decided, let alone some kind of he-said-she-said dispute like the case here.

If I were the OP, I'd just sign up again with a burner phone number.