Biometric varification failure at the time of pre joining formalities

Respected Sir, I was selected in IBPS clerk recruitment and called for prejoining formalities. In biometric thumb impression checking there were 2 portals. My biometric successful in one and in second it varies from 40% to 92% matched but not successful. They asked me to go home and wait for further step for bank to varifies my credential. But after that no mail or contact has been send. There were many means to varifies my credential like left hand thumb impression on paper, signature and camera photo taken along with biometric thumb impression. I am a genuine candidate and want to fight for my right to serve as a gov. employee. Sir please guide me what to do and how to ask them why they not manual checking of credential because failure in one portal is technical glich not mine.. please provide a way thank you....