Spelling mistakes in my and my father's surname in marksheet

Hi sir / madam My name is sayali chavan I have complete my graduation.i have query about my Surname's spelling difference. 1 ssc school certificate : Name- sayali suresh chauhan ;(uh included here) Father name - suresh vishnu chavan 2high school certificate: My name : sayali suresh chauhan ;(uh included here) Father's name: suresh vishnu chavan. Graduation : My name- sayali suresh chauhan ;( uh included here) Father's name- suresh chavan. My actually surname is (chavan) but in my all marksheet is written chauhan. In my other documents like andhar card ,Pan card, and cast certificate my name is chavan I went my school so many times and resolve my problem but they said now you can't change this surname it's very Long time so can not be done.both chauhan and chavan is not sounds same. chauhan is like bhaiya lug .If there is any solution to change my surname please give me. It will create any problem in government job at the time of documents verification if yes what should I do..?