Help with dealing with someone who is in denial

Hi All,

I have never used a forum before but I am at my wits end with my Dad. Early this year he was diagnosed with Lymphoma. He won't talk about his condition. At first he said it was an unknown cancer and the speciallist had no idea. then we found out it was lymphoma. He said that all the specialist had said he had caught it in time and he would be fine. Every time we mentiond doing a will or talking funeral he would say that they had assured him that the treatment had cured it. 

Anywway we found out 2 weeks ago that the last 2 treatments haven't worked and he had 2 choices go home and have 3 months or try another trreatment.We went for the treatment and I phoned the hospital to talk to the nurse to see what would happen if it doesn't work. Unfortunately she couldn't tell me over the phone ( I live in North Yorkshire he is in London). When he found out he had a go saying they would kick him off his treatment if I pestered. I phoned once Can they do that? He also said that now he has had the treatment he will live for 30 years and be here till he is 100. Is there a miraculous cure. If it doesn't work will it have extended his 3 months as he said it has?

Thank for reading my rant.