Airtel — regarding mobile balance

Address:

600061

I recharged with 349 rs.in [protected].But now I am not able call on that number..this month I recharged twice with different amount without tariff.But now I am helpless.please reply me in this concern.i was using a plan of 349 rs.since last six month. It was free Sad plan..but due to tour I used a different plan of 100 rs.after coming from tour I recharged with 349 rs today but I am not able to call.so please let me know the reasons behind lackness of call even after recharge..