Toyota — Clutch plate workout within short period

I purchased innova crysta from Nandi toyota Bangalore in Sept 2018. As I have a maruti swift also I use that for my daily use and innova was used for long trips to coimbatore, chennai and hyderabad.The vehicle has run for the maximum of 30 days during the entire period and during covid it was not used at all.
On 16/11/2020 when I returned from coimbatore, the clutch plate got damaged near Hosur toll gate and with the help of insurance company immediately it was towed to Nandi toyota kanakapura.The vehicle was fully serviced before I left for coimbatore by the same service station and they didnot inform any defects and they have certified that the vehicle is a absolutely fine.
There is no possibility of the clutch getting worn out unless there is a manufacturing defect.So I took the issue to TOYOTA on 17/11/2020 by many mails and phone calls and even after 9 days they donot care to reply any take any concrete steps.
The customer service is absolutely poor.The vehicle is lying idle at the service station waiting for the response from TOYOTA.
As the worn out of clutch plate in 30 days is unacceptable and it could be definitely due to their fault and non response of the company is giving us lot of mental tension .
Hence an immediate action should be taken and get the vehicle repaired FREE OF COST.
All details have elaborately informed to TOYOTA CUSTOMER CARE AND NANDI TOYOTA.
SPEEDY RESPONSE IS EXPECTED