I rely on caller display because of my health conditions anxiety, depression and cancer problems. People said they couldn't get through for a bit so called VM and they booked an engineer, but the line went ok so I cancelled it the day before. Engineer turned up anyway, I said it was all working fine now.and didn't need it but he said he wanted to do tests and things in the van. After he'd gone I now find the caller display no longer works, he has taken it off. Rang VM back on phone waiting for ages explaining and getting passed around everywhere, they said another engineer would have to come, he said he didn't have a clue, thought it might be my phone but I told him its fine because we tried it on neighbours VM phone line and it all works just like it did on my line before 1st engineer came and done his stuff, got back in touch with VM and the other engineer who said he forgot and hadn't changed the ports back? Now told everything is ok because it's been changed and sorted. And Guess What Its Still Not Working. Will someone who knows what they are doing please help???