Non issue of rights share by Modiluft

Hi friends,
I was allotted 200 shares in Modiluft Ltd.Then later ...I appllied for rights issue and was allotted 1000 shares,that was in early 1995.I was never issued the share certificates of rights entitlement.In response to my querry ...they asked me to produce the payment evidence from the bank.
Now in the meantime the ModiLuft has changed name twice.
I donot know how to proceed.
Thanks for any replies.