The onion site is back up and running again, so they found a way to deal with the DDOS attacks. I am sure the team will start processing the backlog of orders as soon as possible, if they haven't already begun.
Also I just realised that the account that has been commenting "eXch Support" which made a comment "Hi, I confirm that we are currently experiencing some technical problem. All orders will be processed as soon as possible, our relevant team is working to solve the problem." on December 27, 2024. This account seems to be a different one to the ones they normally use being that the original has a "Full Member" Position and this one that made the comment has a "Newbie" Position.
Both accounts belong to eXch and are operated by their people. The newbie account you talk about is a dedicated support agent for Bitcointalk that can be contacted by customers who are experiencing issues with the service.