Microsoft — My new mobile charging point not working

Address:

Jaipur, Rajasthan, 302001

I have purchase one microsoft Lumia 640 XL mobile dated on 12-12-15 in Jaipur. In month of Jan 16 i found that it is not getting charge by charger . I shown that mobile to Microsoft care . They are telling that you have damage the point of charging and it will not come under the warranty. it will cost 2000 Rs for repair How it is possible if i am using same microsoft charger . And also when i went to customer care at new sanagner road Sodala Jaipur the customer care officer (name Rohit) his behavior was very bad . talking very nonsense to the customer. Please help me out regarding that. I am help less