Xiaomi India — service center wrong information

During first visit service executive said after checking the device and bill for display concern and said there is display issue and you have to replacement it and she said it will be free of cost and part is not available so she said me to come in next week... Today i visited service center now without checking the device now they are saying it will not be free of cost you have to pay 4700rs, so i asked last week they informed him that display replacement will be free of cost.. Now service executive is not responding anything and said call to call center and complaint to them... Without checking the device they are saying the amount for replacement worst service executive... They are least bother of customer complaint and arguing illogically with customers.