Advise

One man 55yrs old claim to be my father son. My father is 74yrs. In his birth certificate he mentioned his father name as ram. In his petition he has mentioned shaam alias shaamu (my fathers real name.) He his mother was married to him, been in his house for 2 years in 1967 and 68.but that was the time my father was in 10th std . My father was born in 1949. He has been using my fathers name in all documents as shaam . My mother has married to my father in1971. District court has order DNA test without any inquiry. We joined army in 1968 oct returned in 2001.. That man was born in 23.3.68. He has no schoolrecord. That man has elder sister who is born to another man and his mother. He has directly asked DNA test as the only mean to prove him his father. Court has given order. Now we are moving to high court with no idea what to do. Can we prove shaam and shaamu are two different people. Can a district court give DNA test without inquiry?Can i ask for cbcid inquiry for fradulence and tampering the documents. How can i stop the DNA test. How can a court order DNA test without him giving any prove just by saying that mother was illeterate used jhs pet name in the birth certificate. Why court can accept both shaami and shaam are a name for 1 person. My father has used shaamu in all documents. How can somebody after 55 yes claim this way. How can jjudge give a judgement this way? I think there is political people also involved in it. WHe is fraud. Pls 🙏 to come out of it. I am moving to highcourt chennai. Suggest.why court is not asking to prove that both the names are of same person.