Dear Nancycy, I think you have broken the rule. So you are not going to get help from yahoo administrators. Lets try to make another answer account. All the best.
You can get it back. Contact to Admin and say what was the reason for ban. So that he may send activation link. So that you will be able to use it again
If yahoo blocked your account then it wont give you the access again. So its better to forget that and try a new one. But remember sharing too much link will again lead to account blockage