Reliance Communications — Plan changed without notifying me

Address:	226021
Website:	www.rcom.co.in

Reliance Dongle no.-[protected]

I have upgraded my reliance dongle to the 4g one and i was promised that i will get the same plan as i was getting before that was 40gb/month but now that the month is over and i have used my internet according to the 40gb data usage they told me that my plan has changed to 5gb/month That to when i asked them.
Now my bill is more tha 4000rs.This is total fraud.And when i called them they are saying that they mailed me on 5/Aug/2016 that is almost two weeks after the service was provide, but there is no such mail.

So I talked about this to there customer service representative and refused to even file the complaint against the company.

This is the whole conversation:-

Anupam: Hi
Reliance Live Chat: Connection established.
Reliance Live Chat: Initiating Call, Please Wait.
Reliance Live Chat: Welcome to Reliance Live Chat
Reliance Live Chat: http://www.rcom.co.in
Reliance Live Chat: Connecting... An agent will be with you shortly.
Reliance Live Chat: Welcome to Reliance Live Chat.
Anupam: my dongle is not working
Mahesh : Good Evening ! Sir, Let me reconfirm your number [protected], Is it correct ?
Anupam: and you guys are cheat you changed my plan without notifying me
Anupam: yes
Anupam: I was promised that the plan will remain same after upgradation
Anupam: but now I m being told that the plan was changed to 5gb/month
Anupam: this is fraud
Anupam: and that to when my dongle stopped to connect
Anupam: are you going to reply or not
Mahesh : I am sorry to know that.
Mahesh : We have sent the intimation thought the Email regarding your plan has been changed.
Anupam: when
Mahesh : please checked your mail inbox for the same.
Mahesh : We have sent the mail on 05/08/2016.
Anupam: there is no mail
Anupam: if so why on 5 aug
Anupam: the service was started much before that
Anupam: why not not before it was started
Anupam: and why would you change the plan without my consent
Anupam: who gave you the right to change the plan
Mahesh : Please refer your bill second page F point there is mentioned Reliance has full rights to change the tearms and condtion of plan from time to time.
Anupam: you guys are bunch of frauds
Anupam: you didn't even notified me the change of plans
Anupam: I was promised that the my original plan would continue
Anupam: that's the only reason I upgraded
Anupam: this is total fraud
Anupam: I m going to launch a formal complaint against you in consumer court
Mahesh : I am taking down your feedback for the same.
Mahesh : Is there anything else apart from this I may assist you with?
Anupam: I want to lodge a complaint regarding this
Anupam: can you file a complaint
Anupam: an provide me with the complaint no.
Mahesh : Sorry i canot lodg complaint regarding this.
Anupam: why
Mahesh : We have intimated you thought the Email regarding your plan changed.
Anupam: I have no such email
Anupam: i have checked my email twice now
Anupam: so please file a complaint
Mahesh : Sorry i cannot take down your complaint.
Mahesh : I am taking down your feedback for the same.
Mahesh : Is there anything else apart from this I may assist you with?
Anupam: you guys are really frauds
Anupam: don't worry i have stored whole of our chat
Mahesh : Okay.
Mahesh : Do you have any more queries?
Mahesh : Are you online?
Mahesh : Are you online?
Mahesh : As there is no response from your end I need to go -ahead and disconnect this chat session.
You may login again to chat with any of our Customer Service Representative.
Thank you for choosing Reliance.
It was a pleasure to assist you.
Bye.

Reliance Live Chat: Chat disconnected

So can you please help me to get the services that i was promised.