Mahindra And Mahindra — Car painted local workshop and colour fading

Address:

Henna Mahal. Pulliman junction Karunagappally. Kollam

My car#KL41H5617
Contact#[protected]
My car meet with an accident and its front bumber damaged i approch Mahindra workshop (pothens karunagappally) and they replaced with new one and they informed me they will paint from there workshop. Unfortunatly they painted local paint shop. I found this and make complaint (because it is cheper for me to paint outside). They promissed me they are responsible for any mistakes. After that i found tge colour is fading and i approch them they told they will. But no response from there side.
Kindly request to find a solution for this.

Regards
Sajin ahammad