Somethings not right

My dad went into a and e in December and was diagnosed with a tumour on his kidneys. He was sent home with no care package in place and a prescription for morphine. He was told to wait for the results of the MDT. I contacted doctors in the mean time for various symptoms and kept getting told that nothing could happen until the results of the MDT were through. He became bed bound, unable to eat, confused and had difficulties going to the toilet. He got taken back into hospital after Christmas after blood results showed increased potassium (after we had asked doctors for a home visit 3 times before they agreed to come). He was given another CT scan and told he had days/weeks left to live. He died 5 days later in hospital on a respiratory ward surrounded by 5 other patients. 

No biopsy was ever taken. Urology doctors said he should never have been given the morphine he was prescribed. Doctors said the rate it had spread wasn't consistent with kidney cancer. They told us 1 day before he died that his lungs were filling with fluid. We had to ask them for pain relief for him in his last hours. We had to wet his lips with a sponge. There was no care at all. 

Something seems wrong. I think he's been badly neglected but what do I do?

Has anyone else experienced something similar?