Airtel — unable to open certain websites using airtel mobile data

Today morning i just recharged with Rs 379 /- after that when i try to open certain websites it is just redirecting to http://one.airtel.in/rcconf and nothing is working after that i contacted Airtel customer care on call and thier response was simply remove the SIM and restart handset. They even don't know the exact problem and Customer Support executive told that there is no issue from their and issue is with my handset only and he is speaking very rudely and he is saying i have to wait until the issue resolved even if it takes one year. He is also saying that i can complaint to any one.
This is how Airtel is treating customers. They just sent some settings messages none of them are worked. And there is no way to reset their APN settings in IOS(I Guess).