Toyota — innova crysta brake pads defect and no response from customer

Hi, i waiting a response since a month but did not get any response from a concern department not from service center. During a call with customer representative he said you will get call from concern dept but no reply or call from your side. How many days i have to wait for the response.
The following is my complaint

Last may month i have purchased new crysta 2.4z. My driver took car for 5000 km service but they said i have to change brake pads. I don't understand how can a 3months car should change brake pads only within 5000 km. Even for my previous car innova 2.5v we had changed brake pads only after 20000 km. If it is necessary for every 5000 km i don't think this is good. We are still using innova 2.5v but changing break pads only after 20000 km.

Due to this late response we had paid rs 5000 for break pad replacement. I think it's a manufacture defect so i would like to refund money and need a proper explanation from concern department

Thank you
Tharun
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Ref no: tc1758014