Resolved Question: How do you change your spam filter for yahoo email to the highest level?

I have been getting all of this spam mail for two weeks that I have never gotten before. I do not know who sold my email address or how my email address got stolen, but now I get all of these weird emails that i don’t want. I only received emails from my contacts before. How do i stop the spam, and how do i set the a filter to extremely high to where i wont get any spam for my yahoo email addy?