Akosha.com — date of joining and designation while working with satyam computer services

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Bangalore, Karnataka

Hi,
I have worked with Satyam Computer Services Ltd as a software engineer. My employee id was 50564.My date of joining was september 2006 and Date of Relieving was 13 March 2009. But later Satyam Computer Services was take over by TechMahindra.
But Now for a Background Verification TechMahindra gives a report that My Date of Join and Designation is different from what they have given in the experience certificate from Satyam Computer Services Ltd.
Please help to file an RTI to know the date of joining and Designation in their database and why it is different from the experience certificate given to me. I am very much sure that the experience certificate is correct.