Help needed as my GF father rejecting me, how should one convince such father.

I’m 29M from UP, she is 27F from Bihar. We are together for last 1.5yr, around 5-6months back she told her parents about me but they are not ready for me, her father is very strict , he did went to my native and met my parents, but gave the reason that he is looking for a groom in near by places in Bihar. He did brought 3 matches for her but she somehow rejected them, but now he is fixated on one more guy. When my gf told about me he said go marry that guy and don’t come here. We both are really stressed.😣 One more point is that guy is very wealthy, gf mentioned negative points like less height, way of talking is not good, but her father says so what you have to marry him. Father is very dominating, doesn’t even listens to anyone, her mother supported but he is not listening.