the family of a disabled man claim he had his toes amputated after he was forced to live in a tent through the winter because he was evicted from his home .
mitchell keenan , 32 , was diagnosed with frostbite six weeks ago after his sister discovered his blackened toes and rushed him to hospital .
they were so badly diseased that they could not be saved and they had to be amputated .
mr keenan 's father was also diagnosed with severe health problems including malnourishment , scabies and dementia .