Thanks for your feedbackDelete the comment or report the account. Create alternate accounts and spam the hell out of them, troll them back. Always fight back, be a biggest troll they will ever see in their life. Some will say ignore them, but thats my 2 cents.
Oh appreciate youThe best way is to ignore and stop checking notifications. The more you check, the more angry you will get and it will trigger you to post abusive comments or shity comments and you will end up with ban or it will hinder your account growth.
This is the best option.