Mahindra And Mahindra — xuv500 w6 variant. passenger door dented

Address:

New Delhi, Delhi, 110075

I felt my dream come true after my mahindra xuv 500 w6 delivery date arrived. I arrived at showroom with full of enthusiasm. All my paper was ready and then i saw a dent on passenger door. I asked the dealer to get it fixed. He said that he will get the door changed. Upon waiting for around 4 hrs from evening 4 to 8 car came back from garage. I noticed the door was not changed instead denting and poor painting was done. I asked the dealer then he said that i can take the car now and he will get the door changed in my next visit. I have this in writing as well from the executive. Since then i am following up with dealer and getting new execuses and date.
Please help me in getting this fixed.
If require i can share the photo as of car where poor painting can be and seen and scan copy of writing.