Nokia — Nokia 5.1 Plus, i am facing constant problems in the handset like battery discharging on connecting charger automatically

Address:	C/O Innovative Tradelinks Services Pvt. KH no. 78/180, 181 Ground Floor, Village Bakoli City, Near Som Bazar Road DELHI - 110036 , Delhi , India - ( XDL3 )
Website:	www.nokia.com

I bought Nokia 5.1+ from Nokia.com on 13 December 18. From then i am facing constant problems in the handset like battery discharging on connecting charger automatically, power off lag and hang issues, but Nokia didn't cooperated me as i am calling them from 2nd day of buying.
Charger is not properly connected and when i visited to the center while phone was in warranty they said charging pin got moisturized and thus needed to change it which will approximate cost me[protected] with few more corrections. I don't understand that such a renowned company in which i am trusting from the beginning and also welcomed its comeback made such a fragile connecting point which without any contact to water due to moisture in atmosphere got rusted(as told by service center). This reply was bit ridiculous and heart breaking. No one took the concern into account. I feel so cheated. Please help me i[censored] can. As i am not in a position to change the handset. Please look after the whole situation and help me accordingly.