I can't delete my skin


I have recently acquired a custom skin from someone on Fiverr and I accidentally saved it without first log in into my account so I could delete it later after I retouched it a little.
This skin is private and I can’t delete it. I already sent out many reports and the reasons why it should be taken out. But I still see it even after 4 days.

This skin should be deleted: https://minecraft.novaskin.me/skin/3960693060/Skin-from-Kiri-on-Fiverr

Could someone please delete it? Thank you!