Union Bank Of India — Database rollback

Address: Mumbai

All our accounts in Union Bank already had nomination registered.
Yet I receive an SMS that Nomination is not registered. Use internet banking / mobile app to register nominee.

It seems their database has somehow rolled back.
Moreover when I try to add nominee thru Internet banking it errors out
AAND018 Technical error while adding nominee Please contact e-banking.

I tried to contact ebanking [protected]@unionbankofindia.bank / [protected]@unionbankofindia.com but no response.
They have not also acknowledged the mail
Soon we will be closing our relationship with Union Bank