Hi, I’m really sorry that you have experienced this. Unfortunately, we are not able to extend any auctions that have ended already. I can assure you that if we find any malicious intent in any of our auctions, we will act accordingly, as it’s really important for us to have fair biddings.
According to support the maintenance wasn't really "scheduled" & the website was actually brought down by excess traffic.
I think it's possible that the person who won the auction DDoS'd the site to prevent anyone else from bidding.
Can this be investigated? If the winning bidder only "won" by taking down the website to prevent competing bids, would that not be grounds for re-opening the auction?