Be as rude about him as you want to be.
He is abusing you when you are at your most vulnerable. He is withholding your medication (bet he hasn't lost it, though he could have thrown it out). He is probably revelling in this, as he sounds like a self-important arsewipe.
He is hanging around like a bad smell because he IS a bad smell. You need to get him out somehow.
You seem to think that you are not very sick, but you are. You have had major surgery, a kidney removed and have lost a fair bit of blood. You are in pain. Therefore you have an urgent need of nursing care in your home, as well as your regular medication, which I presume includes painkillers and antibiotics. If he isn't giving you these AND he has opened up your dressings to touch your wound with unclean hands then he is putting you at serious risk.
I think that you sound ill enough to ask for a home visit from your GP, and I never say that sort of thing lightly. With the sort of surgery you have had and the pain you are still in then I would have thought they would visit without question. When they do you must tell them what is really happening with regard to the so called "care" (I use the term very loosely) that this twat is not providing. For he is not providing care. He is providing abuse and risk. He is bad news. Tell them this and stress it (hope they can come when he is out), say how badly you either need the district nursing team to visit each day or you need re-admission to hospital for the next two or three weeks (or whatever the expected duration of your recovery is thought to be). Anything should be better than what you are getting at the moment.
In fact, re-admission to hospital would get you away from the arsewipe and give you a chance to be free of him.
Just my thoughts. I think I read a couple of your other threads, though didn't comment on them.
Sending you 
now, as that is all I can do.