Gigantic infotel - Internet service provider : charge so much but not provide good services

I have shifted here in TDI city in last april ****. I usually do work from home during night because of my company requirements and i need high speed also. this Gigantic guys come to our house and advised it they ** mpbs plan that will good for my usage and cost around **** bucks so i agreed. My house a * bedroom hall kitchen so Gigantic guys advised me to take two routers as well and they given one faulty router which by the way they never replaced after so many complaints given to them.
although even after their committment the net speed was never ** mpbs. it alwasy below ** and i called them multiple time and they only send their one careless engineer Ashish who do nothing but bullshit from last couple of weeks the net is not working on night and they are helpless about it