the number is correct. I talked to them yesterday and today. if you didn't get through then you should try to call them again. I got the same message as your got when my first time called them in yesterday afternoon. I waited for a hour and called them again, and got through.
your want select 7 for EE information and then 0 to talk to the agent, and then you will be put on waiting, during your waiting time, the system will give you some recorded information such as go on website for information etc.. then tell your the estamited waiting time for the call; both yesterday and today I got through; looks like calling in the early morning is easier to get through, my waiting time was about 15 mins in the afternoon and this morning was less then 5 mins.
the agent can be helpful only if you have a very specific question, so they know where to find the information to answer your question. you can layout your questions before your phone call; sometime, discussions here would be helpful--- it will help you make your question precious, short and sweet, so agent can easily get what you are asking for.
Hope this is helpful. Good luck!