Call is picked up then left off the hook

I received a quote from Hollard 10-minutes ago - great service. I want to accept it.<br> Now I am trying to call the Call Centre - this is my 4th attempt. 5-minutes and counting. I know I am through to the Call Centre - I can hear everyone's voices, but no one is speaking to me. \HELLO HELLO\" I am shouting into the phone.<br> It's also lunchtime. Is this the reason? Then rather don't pick up the phone, don't pretend to take a call when you can't speak to the customer on the other end."