I was trying to change my birthday so the birth year was not incorrect any more. ... I created my Twitter account in ****. I was ** (underage) years old at the time (I am now an adult after nearly a decade of having owned this account, **), so I set my birthday year to **** instead of ****. I recently tried to change the birthday to reflect my actual age, and it immediately locked me out of my account for "being underage at the time the account was created." I have yet to hear from Twitter about this, and cannot even access my profile page while logged out (it says it does not exist). I selected an option from a preexisting Twitter support list saying that I was underage at the time of creation, and that I would get a reply*instructions on how to gain access to my account back soon.
This automatic system punished me for being underage nearly a decade ago, when Twitter's ToS did not even cover automatic bans for underage users.
They could make this right by contacting frustrated users sooner with clear instructions how to resolve the issue. Twitter has told other users before that they should send photo ID, birth certificate, or others means of certifying that they are above Twitter's minimum age. Many users have complained for weeks without responses from Twitter despite their efforts to prove their age.
I have had my Twitter account for years and have not broken a single rule on their ToS aside from changing the birth year on my account.
I have tried to call Twitter and use their customer support extension, only to find a prerecorded message that said they do not offer user support over the telephone. I have not received a response from Twitter at all yet, and I have no access to my followers*following list if I wanted to make a fresh account. I cannot use my old handle or email right now, either.