MR rejected.

Just recieved my MR rejection letter. I was in receipt of PIP for four and a half years. It was removed last September. I've gone from lower rate for both components to zero points. My health has not improved, it has deteriorate. I am still disabled, I always will be and I still have mental health problems. Last year I was diagnosed with a heart problem. The report I've received contains inaccuracies/lies. I am 60 years old, having worked all my life from the age of 16 till I became disable after an accident. I know I can go to tribunal but that will take a year to a year and a half. Without wishing to sound dramatic, I know I won't live that long. The stress is killing me. Does anyone know if there is a quicker process? I know I am clutching at straws. I hope the DWP know the devastation they are causing to people like me. I suspect they do and I suspect they don't care.