You have to select the option to get an update on your existing application, and when prompted, enter your UCI, then your file number, then listen to the recording that reads out the details on your gckey account. Then, finally, after a long while, you can select the option to speak to a representative.
Select that option and be immediately told that all agents are busy helping other people and please call back later - then they hang up on you.
It took me 10 tries over a few days to finally reach someone recently. When you do finally reach someone, please don't take this ridiculous experience out on the agent - they're overworked and stressed beyond belief. A little sympathy improves the quality of the information they provide considerably.