Oh man, this is priceless!
You take everyone's hard work and sell it, then I share one of your covers made up of 90% "found" images, that are all copyrighted, and a single graphic that you say you made (again, copyrighted likeness that you don't own), and you've somehow been wronged?! This is beyond hilarious

You didn't call a lawyer. If you had half a brain, then you'd know that's gonna get you just about nowhere. Plus, why risk damaging the place that keeps your business afloat? I can't wait for your argument. "I made that image of a copyrighted character for which I do not own the license. I'm gonna sue!"
Based on your other work, I'm about 99% sure that the image that you claim to have created was built by someone else. Prove me wrong.
Also, if you want me to take it down, then just send me an email.