It's probably not too much overall, but I did some snooping and found this account: https://www.deviantart.com/its-koko which, although last uploaded to in November of 2022 (so last year), seems to be the account reached most recently that's associated with this person. At least, outside of toyhou.se . It could be they have since rebranded, since they do have good art so I wouldn't be surprised if they were selling it under a different identity. I tried hunting down possible alternative usernames they might use, but all I found was Hereiskoko, Its-koko, koko, kokoa, hereiskoko, magicalkoko. If you're within the 6 months and paid with Paypal, it might be worth issuing a refund dispute? Since it's been 4 months and you haven't heard anything from them. Perhaps it's the dispute that gets them to actually care about the commission again, idk.