Thaily

If they're being this inconsiderate of your feelings now, it'll only get worse in the future. I'd pull my character if I were you. If the story doesn't mean much to you, I'd let it go. Odds are this isn't going anywhere anyway, with how they're flailing about currently.

What a bummer, and your work looks so great. I say grayscale the characters and resell as a YCH.

Not giving refunds is illegal in many places, regardless of whether or not the customer is an asshole or not. Personally I'd accept a killfee from an artist with an otherwise impeccable reputation, especially if the commission requires non-reusable materials like traditional media but Goldenwolf's professional reputation hasn't been impeccable for a while now. I have a feeling we'll be hearing from more slighted customers in the future, sadly a lot of people are still too intimidated to publicize their grievances. The waiting time is obscene. I understand needing to pay bills and taking more commissions than you can finish within a reasonable span of time, but in that case you're open and honest about it and don't block customers who have already paid. With her "asshole no refund" clause it's just way too tempting to let people stew until they explode and THEN block them so you don't have to finish the work and also not return their money. I didn't think that someone like Goldenwolf would fall into that trap, considering the prices her work used to fetch, but here we are :/

Some people take days or even weeks. It's very frustrating, but not uncommon.