Reliance Communications — postpaid mobile connection

Address:

Mumbai City, Maharashtra

93xxxxx06 is my postpaid reliance communication number. Reliance commn proactively called me in august'17 and changed my plan to 1549/- for 3 months and they said unlimited calls for 3 months and 20 gb data per month i will be getting. I have paid the full amount in advance in august. Last month they have generated the bill according my previous plan 449/- + tax. I wrote 3 times mail to customer care but no response. Also i could not reach to customer care over phone. From today my outgoing and incoming calls are barred.
This is very irresponsible behavior towards customers. Reliance commn cheating customers by charging advance payment then stopping the service.
Please check and look into the matter asap or else i'll have to complain to consumer court further...