Your account is not irreversibly ruined.
You have four answers in total on this site. Three of them were downvoted and removed, two by you and one by others, though you may not recall removing those two. You can view two of them in your recent deleted answers list (this link will work only for you and diamond moderators) and the third one is here.
However, you are only blocked from answering. You are still able to ask questions. Asking good questions will help you earn your way out of your answer ban.
The answer ban is automated and we cannot do anything to lift it ourselves; only you can. The answer ban takes place because your contributions aren't being accepted well and is a suggestion you need to wait and learn how things work first.
I am under the impression that when you try to answer and hit the blocked message, you're given a link to What can I do when getting "We are no longer accepting questions/answers from this account"? on main meta. If not, there is the link now: I suggest reading through it.