I have had another EBUS 2 weeks ago and the results again are inconclusive

I had an EBUS in 2014, it was inconclusive, I had a Mediastinoscopy which caused  a 200ml bleed, hypertension and incubation and a 24 hour stay in icu, I have had another EBUS 2 weeks ago and the results again are inconclusive, a further Mediastinoscopy was mentioned in MDT. I have refused this test as I have had a heart attack and bypass surgery. I feel that nobody is interested or cares. I have been made to feel like an awful patient refusing treatment. Nobody is listening to me or my concerns