Nokia India — worst service and bad behaviour with customer

Address:

Vasai, Maharashtra, Thane, Maharashtra, 401209

I have nokia 2.1 purchased on 13th september, 2018. It is in waranty and giving issue. The issue is when the mobile is switched on and pluged in charging... It doesn't charge and when switched off and pluged in it get started charging. I just take my mobile to vasai nokia service center. They took 4days and told me that some liquid has gone inside the charger pin. I just asked them then "how my mobile is getting charged when switched off?". They were speechless and the technician started arguing with me and told me that 880 rupees would be charged to make the mobile. When i told him that it is in waranty he just then started arguing with me using bad words. I was thinking nokia is the best brand but today it just changed my mind. From today i will never suggest anyone to buy nokia.
Please help me!