Pureit / Hindustan Unilever — leaking from a newly purchased water purifier

Hello sir,

I purchased a pureit for my mom and dad as i really heard good things about you from my friends and family but the product which we bought on[protected] had some leakage problems so my father complained and the technician came and what he did was so unhygienic he applied a plastic tape to stop the leakage. It worked for somedays but then after some time it started to leak again we called again and this time he said it cant be repaired and we need to replace it.
Since then my father is following up with pureit and technicians to get it replaced but still the issue persists can someone please help me in getting it resolved.
I stay in chennai and my parents are now tired following up with them i request if anyone can step forward and help me.
Complaint no is: - co[protected]
Also there are numerous previous complaint numbers which you can check.