Toubro Holdings Ltd — redemption is not receiving still now.

Hello sir,
My mother dipika biswas purchased number of share 500, each of share value rs.10, total value 5000 & redemption value rs.25500 which was maturity on 18/05/2015 from toubro holdings ltd. (Certificate no.58770).

Original certificate deposited on 22/04/2015 before maturity in branch.

But still now she has not got any money from this company.
What should i do at a time?
Please suggest me.

Thanks.