Nokia India — complaint about nokia 6 mobile phone the.

I have pitched it on 26th nov'17. Due to sweat it was stopped to functioned. I provided it for repairing to malda nokia care centre, but again it not functioning and once again i am asking about 5500/- for repair. With this warranted period, why i have to such amount.
This kind reputed co. S created such problems, whether you expect i will remain with this co. Or recommended to others for your co.'s phone further.
I need kind positive support from your end.
Thanks
Yours faithfully,
Dinobondhu saga.