I kept ringing the number then pressed 1,1 after it answers instantly to bypass the automated stuff, did this for about 10 mins then finally got in.
started at 19th in the queue, now 14th, 15 mins in. I reckon 1 hour of queueing.
luckily have a day of annual leave which lined up with this, other than that I'm not sure how people are meant to do anything.