Changing DOB on academics certificates after 10+ Yrs

Hello All, I want to change DOB for a relative (named R) on her 4th TC & using same as a basis on 10th TC. Her DOB got recorded wrong on 4ht TC & which was carried to her all remaining academic certificates. R passed 4th from ZP school in Maharashtra in 2001. R then went to private school from 5th to 12th. Now the 10th (SSC) school is ready to change DOB, but they are asking her 4th TC with proper DOB. Once they get it - they are ready to do further proceedings for SSC DOB change. The main aim here is to change DOB on SSC certificate. R is preparing for competitive exams currently & for PSU jobs, SSC certificates DOB is considered. We are able to obtain a proper birth certificate from concerned MH govt department for correct DOB. The same has been submitted to the Primary School Department in ZP. But these people are going being very unresponsive. They are not ready to change 16+ years old record. I escalated the matter & got call form education officer for same ZP. He could not produce a proper reason as to why the request is being denied. He was like - its too old & hence they can not do it. (You know - the typical lazy kind of PSU employee attitude). I have asked him to give me in writing as to why the request is being denied. Did not heard anything so far. Now I have all the proper documents supporting DOB. Even 10th school is ready to change DOB. But I am just stuck here because of stubborn attitude of ZP education department. What should I do now?