Cannot delete partition after failed windows install using boot camp

Basically what happened is i deleted windows from my mac with bootcamp,and i tried reinstalling it a few hours later,it did not work and it gave me a error saying it could not be made,i tried to delete the failed partition and it did not delete,i had enough space for windows,i could not delete it at all,i even factory reseted my mac about 2 times and still kept the partition trying to remove it is greyed out,i had the option to at first and it did not remove it,and i need to install windows to my mac as i have apps i use daily that are not for mac,and boot camp will NOT install windows because of this partition i can not delete,i am using mac os mojave