This seems to be a common issue this year. TCD seem to have had a huge increase in applications for this year.
I’d suggest investigating a backup option for your accommodation but don’t lose hope about Trinity Hall. All of the offers that have been made are based on the students getting first round CAO offers. If they don’t manage that the rooms are then available for someone else. Just keep in touch with the accommodation office to make sure you’re still in the running for any that do open up.
If you Google “student accommodation Dublin” you’ll see a number of options available, so have a look around. There’s also a TCD Reddit where you might be able to get additional help. I’ve seen some other similar issues mentioned there over the last few days.