Kent RO — The service centre is not able to control the TDS

The tds of water that we were drinking was 30ppm only. And the service centre be care of indore doesn't take any responsibility. He changed all the filters and still couldn't control the TDS. I think they are using old filter membrane and just changing the date outside. He seams to be a fraud and I'll.not tolerate if it is about the health of my family. I have asked thrice for a senior technical person who can help us out but Kent always send some authorised service centre person and they start to sell their packages and cursing the other service centre. This is not solving my problem. As a renowned company it's your responsibility to treat your customers well and atleast don't take issues like water lightly. Lemme know if you cannot solve it in written so that I can share it with people and they should not fall in your trap of swaach ghar. Maintain some standards I would suggest