Early this year I entered into a multimedia collab (they do music, I do art) with a musician on FA. They completed their half in August - all that's left for me to do is to complete my half.
I logged onto FA today and saw that the person I'm doing the collab with has an ad banner up. They're using an icon they commissioned from me in March in their banner, which is advertising their music commissions, in clear violation of my TOS (which states that commissioned artwork is for personal use only - and I wouldn't consider this personal use). They didn't approach me to ask if they could use my artwork, they didn't let me know before or after it went up, and quite frankly I'm very upset.
My problem is: considering I have this collab to finish with them, I'm not sure how to proceed here. I want to approach them to let them know that they're using my artwork without permission - but I also want to blacklist them from working with me so I don't have to worry about them violating my TOS in the future.
I don't want to work with them again, and I don't want my name to be associated with their work - is it fair to pay them an amount for their work on the collab and cancel it? Or should I just continue with the collab so it can be done, and blacklist/block them afterwards?
Any advice is greatly appreciated!