Is Aquaguard Service in Goa good?

Hi. Recently bought an Aquaguard waters purifier. The person who came to install was worst. Did not have basic plumbing skills made a mess out of the product. No courtesy at all. Had to call my own plumber to fix the plumbing. The one assigned on the app is different . Is Aquaguard running some scam in Goa. Any help how to get this sorted?