Livpure — Livpure water taste like bore water

I bought Livpure 1 year back. From day 1 water taste is like bore water. I raised complaint and service engineer replaced filters and he said “according to government norms there are some pH that has to be maintained so that’s why water tastes like this. Going forward all RO brand’s water will taste like this only”. He was not ready to accept my complaint and he simply replaced filters. Then after a week I again raised complaint and this time he was very arrogant saying “I have already explained you about water taste then why you are raising complaint again”. He was very rude. Only Livpure water taste is like this. I tried other ROs aswell everything gives great water taste. Then how come Livpure water alone will be like bore water. Does government norms applies only to Livpure then? Livpure cheated me by giving somr defect product. I paid 12, 500rs for this useless product. Trust me the tap water tastes same like Livpure water. I want immediate replacement for my RO or take your product and give my money back. Don’t cheat us. One more thing please don’t send this service engineer in Erode again. He has no manners on how to speak to a customer. Send someone from other region and not from my region.