Mahindra And Mahindra — Defect in a body part of newly bought car

I purchased a new mahindra xuv 300 w8 (o)from Mahindra snowview automobiles Pvt Ltd bye pass, kumarhatti, solan, HP on 8/10/2020. After 3 days, I noticed sudden upliftment o[censored]pper part of left strip located over front window. It was taken to Mahindra workshop next day where it was attended by a mechanic. But, the very next day, same fault redeveloped. Such blunder in new car is beyond expectation. Kindly, take the matter seriously and do the favourable immediately.