Mass Delete 12k comments-suggestion needed

I need a way to do this, perhaps there is and im overlooking it.

Over a few years, I never trashed and of the Un-approved comments(yes, i know bad me). Now im stuck with over 12,000 comments that were never approved and I want to delete them.
I do want to only keep the few approved comments though.
Going through and doing a check all bulk delete per page is taking far to long when there is around 570 pages.
Is there a way I can just delete all unapproved comments out of the comment area in the admin area?

Any help would be great. I looked for an option but didnt see one.

Thank you