How do you know that Itch closed that account without also knowing why Itch closed that account?
But no matter who closed the account, Itch or the developer, if you purchased something without downloading, you should ask for a refund.
Also, if the content was removed for legal reasons, you should be informed, because using it in your projects might put your projects at risk.
You should also be aware that response time of support can be several weeks.