That reminds me, I might have to put in a formal complaint for a somewhat similar matter.
Bought concert cards years ago, and was never able to unsubsribe from the newsletter. I sent requests to every mail address I could find, and never even got a response. Still got newsletters every now and then though.
They also just make it unnecessarily hard to contact them, so at this point I’m not sure my messages even reached them, which hopefully is what explains their failure to comply.