Kent RO — Problem raised as overflow & leakage of water from filter.

Address:

Khordha, Odisha, 751021

Hi Sir,
After 6 months of purchase of Kent RO+UV+Grand + problem raised as overflow & leakage of water from filter. then I started calling customer care each time kent's people ll come to assist but each time give excuse as " I have checked it, if complain ll come again then next time I ll change filter & water sensor ". Each time I called these people each time new man came & gave same excuses and each man blamed the previous one that due to lack of technical skill he didn't fix the problem. This process continued till the lapse of warranty period. Now these men are saying changed the filter & sensor (Rs 3000+200) and ll provide you 1 yr warranty on the same.
I would like know if there ll be customer fault - customer ll face the prob. if kent customer care's fault - again customer ll face the problem ?
totally frustrated with these people.
Please guide me how to handle this situation or what needful action I can take.
How this problem can be resolved.