Online webchat never available

For the last 3 days I always get "Our advisers are not available to discuss your query at the moment". I tried phoning the phone number but it simply directs me back to the same unmanned webchat via a text message. While it might be fun to direct people in circles leading to dead ends is there a time or a way to actually get someone to communicate with? gov.uk says webchat is manned 8am - 8pm - and only "might" be unavailable at busy times - this is not prime tax return time so I find it unlikely that all times of the day for the last 3 days things are very busy - please staff your phones or your webchat so my query can be answered.

Hi,
I'm sorry to hear that you haven't been able to talk to anyone on our Webchat service yet. While advisors may not be immediately available, our webchat and telephony services are always manned during the opening hours given on GOV.UK.
As an alternative, you can find our postal address using the link below.
Income Tax: general enquiries
Thank you.