Idea Cellular — My idea sim not showing network by last 1weak

Address:

Koodathumuriyil h anikad po mallapally ,Pathanamthitta ,kerala

I have idea Bangalore sim .I am using that sim since past 6year .when I am coming here Bangalore for studying .one of my frd father taken this sim for me .after I am using this much time it's don't have any problem I am facing .now this last 1weak it not showing network .calls also not going and coing .wat I will do, because of lock down idea office not opening .iam trying to call idea customer care number but calls not connecting .please help me