Idea — Outgoing and incoming calls stopped

Since last 4 days i am unable to call anybody as well as m not able to recieve any calls from my idea sim. My internet connection is also not working. From 21st oct.i was in international roaming and idea charged mei 100 rs.without any reason, so i switched off my phone. But on 24th oct.when i reached UP i found that i was unable to perform outgoing calls and everytime i try to call, it gets disconnected. I am also not able to contact costumer care.t