Worst service from Airtel, closes 5 tickets without solving the issue.

I faced problem with 450TC2 Beetel router right from the day of the installation. I had doubts when the installation person asked whether I have paid for the router or free router as part of plan before taking out the router from his bag. He had installed binatone router for my friends a week before and charged them in the same building.Beetel 450TC2 is the worst router, configure your wifi to have wpa/wpa2 security and you are in trouble. The system that connects first will only have net connection, other systems will connect to the wifi, but there wont be any internet connectivity. I raised this issue with Airtel on July 9, and the service team happily closes the ticket without even visiting the home to maintain the SLA. And when I call back to check the status of the complaint, I was surprised to see the ticket closed. When I asked them to reopen the ticket, the response from the customer care is that they cant reopen the ticket and they can only create another one. I went on to raise 3 more and all of them treated the same way. It happened to my brother while shiffting the landline in May(The service person closed the call without shifting the first time) and I later came to know that this way of closing the tickets are happening with Airtel regularly now a days and it has happened to some of my friend's friend. Airtel service is the worst I have ever come across. I'm going to shutdown all of my other airtel services just because of this worst treatment.Ticket Numbers: 35375246 , 35886362, 36512570 and 37067316. All for same issue and treated the same way.