Last year my sub-domain website (blog.domain.com) was hacked and got lots of spam articles and bad backlinks to it.
Within 1 month I deleted that sub-domain. But I had around 1500s of spam backlinks to that domain. I disvowed those also.
Even after 1 year, I have around 500 backlinks still there. How can i permanently fix this. [The sub-domain no longer exists and not even required. It was delete 1 year ago. I am concerned about the main domain]
Does it affect the ranking of my main root domain?