Vodafone India — sim ownership transfer

I have lost my sim... Which is in the name of my mother... While buying the sim her name is wrong in the provided id... Later her name is corrected in the id...
She is expired in 2012, there after i'm using the same sim... It's lost a month ago..
I have visited the vodafone store... They are asking the id& death certificate... Due to presence of corrected name... Names are not matching... And i don't have the given old id, so they are rejecting my request to transfer the sim card to my name... Please help me to get back the sim