Airtel — net not worked

I have recharged Rs93 on my airtel no. [protected] with facility 1gb net and unlimited local calls for 1 month. I input my airtel sim in 1st slot of my 4g smartphone. But after recharge the highest speed was 2kbps though 4g network is available here. I complained 2 times but don't get any solution. And now I have to face a problem - At the time of outgoing call network shows "no service" and after disconnected full network is shown as usual. What a system of airtel to income..