Mahindra And Mahindra — Non satisfactory service and non return of parts of my vehicle

I had given my xuv-500 reg no. Ka-08-m-4516 for service to ananth cars bannergatta road service station . I had a sun roof leakage complaint for which i was asked whether they can remove the dash box to repair the sun roof for which there was no other option so they had to remove the dash box. At the time of delivery of my vehicle it came to my knowledge that the reverse camera and audio system was not functioning . On asking them to repair it they told me to take the delivery of the vehicle and they would repair it whenever i leave the vehicle next time. I took the vehicle on their word and left the vehicle after 10 to 15 days for retification of the problem. I was surprised to hear from them saying that the system was damaged by me and i will be charged for the same . It was their inefficient servicing that they removed the dash box and damaged my audio system and reverse camera. I said i will not pay anything as it was purely their mistake and i had already paid more than 53k for my service. So they asked me whether they can remove the system from the vehicle and send it to head office for approval. I gave them the system and i havent heard from them eversince. I have been calling the customer care number as well from which i havent received any reply. [protected] is the number from which i am trying to get in touch with regarding my system. Kindly do the needful and reply asap. Please register my complain regarding this issue