Geberit India — Flush tank issue

The water was flowing continuosly . I had called the customer care and a technician arrivers . While removing the outer cover some parts have been broken and the screws had been rusted . The screws were anticorrosion yet it was rusted The technician put new screws and I have paid 160 rupees for the screws . Since it comes under warranty I want you to replace the outer cover since it's broken now . I am uploading the broken part and the screws . Kindly do the needful and replace the outer part .