Live chat on website doesn't open

I’m trying to contact GivEnergy as my inverter is not working. I’ve emailed them but after a reply stating they’ve made some settings changes and “fixed it” (but haven’t). They have not replied to my emails since.

I learnt they don’t let end users call them and I have to use email or live chat, however, when I click on the live chat button, nothing happens. I’ve tried three browsers and none of them start the live chat.

Anyone else had this issue?