Airtel — 2g sim connectivity

Address:	Nalgonda, Andhra Pradesh, 508211
Website:	www.airtel.in

My mother using [protected] mobile under airtel 2g technology.
Every month we are recharging with more than 100 rupees.
But out going& incoming call had been disconected for not maintaing mimimum bal i have right to use my phone airtel not force us to use their service as they wher going in loss. Because when they where making profit they had not given share to consumer so i condem this decission..
I hope trai will take action against airtel to safegurd consumer right.
Day before yesterday recharged with 119 and yesterday they blocked connectivity.
When we asked airtel customer care they are lying like this?

Me:my mobile number have been recharged with 119 day before yester day.
But services stopped and this mobile number is not connecting now! What is the reason?

Care: tell your identification
Me: told and can you tell me why services were stopped?
Care: we are unblocking your services now, you are able to get connectivity in 24 hours.
Me: its ok, but why did you stopped services?
Care: please wait checking
Me: waiting
After few minutes
Care: if you are recharged with more than 35 your mobile number will have no problem, we will unblock your connectivity.
Me: but can you tell me why did you stopped connectivity after we recharged?
Care: please wait checking
Me: waiting
After few minutes,
Care: your number got request to block your connectivity and they said sim was gone.
Me: can you tell me who was complained, can you tell me his name? Becoz we were not complained.
Care: i dont know.

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Me: hello
Care:.
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No replying
Me: you dont know who was complained and when, and how can you block a sim card when it is in service?
2 years ago when we ask you to block one of our airtel card you said sim cannot be blocked when it is in use?
But now how did you blocked it?

Care: put off the call without reply.

Dear indian consumer complaint forum can you case a file against airtel and can you punish airtel?