Elica — Elica hob not working soon after installation

Address:

Bangalore ,whitefield

I purchased elica hob recently from elica Showroom and get it installed at my new home a week ago ...but when an authorized technition installs and check for its functionality..he found it was not working ...he said like my job is to install only the product...if it is not working then other technition has to visit the site...I am checking with elica Showroom executive they are not responding properly from 1 week ...since 10 years I'm using elica but now I feel like i made a mistake by trusting this brand again