This very Meta post is a symptom of your problematic behavior. If you had simply googled stack exchange question ban, you could have learned everything you need to know from the first result. Or even just google the exact message.
Please read through all the content written in this Meta post: What can I do when getting “We are no longer accepting questions/answers from this account”?
I cannot stress this enough: read the whole thing. I will cite some relevant content below but you need to put a little work into understanding the system if you want to improve your situation.
An automatic filter is in place to ban questions and/or answers from IP addresses or accounts with a history of extremely poor posts.
The system has almost surely flagged your IP address as problematic. Using sock puppets to ask more bad questions likely made the problem worse, not better. The more duplicate accounts you open at that location, the more the system's filters will consider your questions low quality.
There may also be other users exhibiting the same problem behavior on that IP address. If you know of them, you might point them to this same topic.
How do I avoid getting a question ban?
Read the pages in the Help Center, particularly those about asking and the Stack Exchange model. Investigate and search before you ask. Put some effort in your questions.
All questions are expected to have some value for later visitors too. So if many of your questions do not get any answer, are downvoted, closed, or deleted by yourself or the community, then apparently they did not meet the required quality. Be sure to understand why that happens, and learn from that. Don't simply repost the same question again.
If you're not sure what qualifies as a "good question", there are some hints and tips available:
To learn about formatting:
That's really important: Be sure to understand why that happens, and learn from that. Don't simply repost the same question again.
How long do I have to wait before I can post again? What can I do to release the ban? How can I reactivate my account?
Automatic bans never expire or "time out." This means that you cannot simply wait for a certain amount of time. If you do not take action, you will never be allowed to post again. The only way for the ban to be lifted is by contributing positively to the site in other ways.
Moderators cannot lift the ban.
Before you do anything else, fix your existing posts! As noted above, down-votes cast by the rest of the community factor into the ban - so the single best thing you can do to get it lifted is to address any objections raised by others. Were your past questions unclear? Did they fail to show any effort on your part? Poorly worded, titled, formatted, and overly long or short? Then fix them!
Note the emphasis on fixing. Do not delete your posts. As explained above, deleted questions (if less than 30 days old when deleted) do still count towards the question ban. Deleting your posts does not help to lift the ban. Only fixing does! Under some conditions you can see a list of your own deleted questions and answers.
If you are banned from asking questions, then writing a few quality answers that get upvoted might enable you to ask questions again. But as the internals of the filter are secret, there is no way to know for sure.
If you really, really think the ban is an error, then email the team directly using the "contact us" link provided at the bottom of every page. But note that reactivation of banned accounts is not a high priority.
Again: Moderators cannot lift the ban. I literally cannot help you, nor can any of the other moderators.
The only way to ameliorate your situation is to improve your existing content. The change has to come from you. Please don't try to fix all 100+ posts in a day. Take one post at a time, and try to understand how to make it the best possible question it can be. Do that for a few posts a day, and focus on really learning how to be a good citizen of the Stack Exchange network.
Also:
My account is in good standing. Why am I still blocked?
The ban also takes in account the IP address. If you browse from a shared computer, or from a location that gives the same IP address to many end users, it's enough that another user who was banned or triggers the ban, will affect everyone else accessing from the same location.
If you are asking many questions from your office, talk to your office-mates and work with them to understand how the system is supposed to work, and make a group effort to improve the quality of content you are contributing to this site.
