Twitter reserves rights to suspend your account that violate the following rules.
Spam: Most of the accounts are suspended because they are spammy, or just plain fake, and they introduce security risks for Twitter and all of our users. These types of accounts are against Twitter Rules. Unfortunately, sometimes a real person’s account gets suspended by mistake, and in those cases twitter works with the person to make sure the account is unsuspended.
Account security at risk: If Twitter suspects an account has been hacked or compromised, it may be suspended until it can be secured and restored to the account owner in order to reduce potentially malicious activity caused by the compromise.
Abusive Tweets or behavior: An account may be suspended if it has been reported to Twitter as violating our Rules surrounding abuse. When an account engages in abusive behaviour, like sending threats to others or impersonating other accounts, Twitter may suspend it temporarily or, in some cases, permanently.
Can I unsuspend my account?
You may be able to unsuspend your own account. If you log in and see prompts that ask you to provide your phone number or confirm your email address, follow the instructions to get your account unsuspended.
Are you seeing a message that your account is locked? Your account may also be temporarily disabled in response to reports of spammy or abusive behavior. For example, you may be prevented from Tweeting from your account for a specific period of time or you may be asked to verify certain information about yourself before proceeding. Get help unlocking your account.
File an appeal and twitter may be able to unsuspend your account. If you are unable to unsuspend your own account using the instructions above and you think that Twitter made a mistake suspending or locking your account, you can appeal. First, log in to the account that is suspended. Then, open a new browser tab and file an appeal.