A Twitter account may be suspended for a variety of reasons. The most common of which is automated mass following or other types of spammy behavior.
What is Spam on Twitter?
Commercial or promotional use of Twitter is allowed. There are many companies who create valuable, opt-in relationships with users on Twitter who want to keep up to date with them. However, if you are following other accounts in order to gain attention to your account or links therein, you may be considered spam. If you are creating a series of accounts in order to promote the same thing, you may be considered spam. If you are sending large numbers of @reply messages that are not genuine replies, you may be considered spam. If you are creating updates in order to show up in search results, you may be considered spam. If you are disguising links (i.e., writing about one thing but linking to another), you may be considered spam. If a large number of users have blocked you (relative to those following you), you may be considered spam.
Other Reasons Your Account May Be Suspended
It’s possible your account may be suspended for breaking other Twitter rules. Impersonation, illegal content, or any violation of the Twitter Terms of Service may result in the suspension of your account.
If You’ve Been Suspended
I’m not happy about this lack of customer service. I have submitted 2 tickets and one email and they replied and close the ticket with a bunch of links. Then after subquent requests, I some how got my account back. (4 days)
Here are the following steps I took which got my account back