Can christian surname is enough to become a christian without baptism

Respected sir My name is Minakshi during our childhood times my parents in order to get admission in Christian school added a Christian surname along with our names and on their names as well to get admission in Christian school with free donation for we three sisters and two brothers. But we never got any admission in Christian school and College so in a hope of getting admission in future and with a little knowledge my parents never changed our surname and I by default gave my class tenth board exams due to which my name became permanent and it was a long process to correct the surname ANTHONY . In 2020 I got married where after my marriage my husband blackmailed me with the surname ANTHONY and claimed me to be Christian before marriage and deserted me and my six months old baby without any clarification . however we already informed about the surname ANTHONY whictwas to be corrected after marriage. I never went to church and never practiced Christianity and baptism certificate is never obtained by me. I don't know how to read the Bible holy book. Please suggest me I am being harrassed and tortured I have been deserted since my pregnancy.also my husband filed a divorce petition on behalf of this false blame. He only submitted my class tenth certificate to claim me a Christian before marriage. Kindly help