Balancing problem, PSP examined. Me.

My father is having trouble in balancing himself, not able to walk alone without support, problem escalated in 2 years. All diagnosis report no Parkinson's but one report said PSP. Right now he is taking ayurvedic medicines but there's not even 1% of improvement. Allopathy meds are very heavy and he mostly feels very sleepy and irritated all the time. He had a continuous sound in his left ear for which he took treatment too. But after that he developed this problem. We have seen almost 50 doctors. But the problem is still getting worse. Some said he had undergone a stroke and some said he has paralysis. No one is sure what caused this and what is this.! He is currently taking physiotherapy for lega and speech as well. Please can someone help me.