Incorrect DOB on expired passport...

Hello sir, My name is sofiya and I am a permanent resident of Canada. Recently I tries to apply for a passport for my mother who is 66 years old now so that I can sponsor her. We have realized that she had a passport some 30 years back with which she travelled to Dammam for a maid job. However, the date of birth on the passport was updated incorrectly then. After her visit to Dammam she never used her passport and now it is expired for log time. We have adhaar card, voter ID card, Bank statement etc that proves her correct date of birth name and other details but the passport Seva Kendra is asking us to submit First class judicial magistrate's /Sub-divisional magistrate's (civil court) court order,if change in DoB . How do we get this ? We do not have any supporting documents for the details given on old passport as that was done by some agents in New Delhi. My mother is not that literate to understand why that was done. Yourr expert opinion would be of great help Thanks Sofiya