You Broadband India — Internet service fraud

I took 3 months plan from them
First they do fraud for router.
They say router works and they tell us to pay for the plan then they say the router we have doesnt work with their network.
secondly their network is notwork from past 25 days i have been calling and complaining but no action has been taken yet .
No one visits i have lodged so many complaints against them for the service no one visits
Till date my internet is not working
I have paid around 3.5k to them
No service given
I want to return their device and get a full refund .