Racold — Geyser WIFI not working -second complaint

I had sent an official complaint on 9th January through your portal with high hopes. The wifi function on my geyser has not been working for the past one year. Racold people to fix it but they are completely ignorant about wifi.
I receieved an email from Racold to know my telephone number. I had requested them to do all correspondence on email for records.
There has been no communication from them since I sent the reply.
Please help.