Zero B — Tank yellow from inside and dust , ants are there in water

Address: Gautam Buddh Nagar, Uttar Pradesh, 201301

Hi,

I have purchased Zero-B around 3 years before, day before yesterday when i saw the tank from inside it has become yellow and ants were there all over.
Company had sent the service guy Mr. Sanjay ([protected]) who came and saw the tank.

Mr. Sanjay Discussed the same with his senior but they gave me no option just to purchase a new Zero-B or provide them 4000 rs to replace the body.
I just confirmed that if after paying 4000 rs again the body becomes yellow, they gave me no guarantee for that.

They are not ready to listen.they are saying they will provide a new zero b machine by paying the full amount and this yellow one will be taken back for 500 rupees.

i have sent n number of emails to
pooja.[protected]@ionexchange.co.in
rupa.[protected]@ionexchange.co.in
santosh.[protected]@ionexchange.co.in
[protected]@ionexchange.co.in

but no one has ever replied.

please help
[protected]