Airtel — no service in airtel sim

I am sneha using airtel no. [protected]. My sim is showing no service from two days. I am using ios mobile. I have done everything to resolve the problem but it is still there. I don't know what happened with airtel. Please let me know the problem or if you are resolving it if not then i think i will change the network. Because of no service i cannot call customer care but with different number i tried to call but the customer care number were not connecting. What the hell is going on with airtel. If you cannot provide good network then please do not make fool of people. I am using airtel since last 10 years but now it is creating problem on daily basis.