Reliance Jio Infocomm — no signal coverage & they are charging for that

There is no signal coverage in my areafor mobile number [protected]. The customer support is asking to wait for 120 days. They are charging for those 120days even thought they are unable to provide the services. When the fault is from their side they should deactivate my plan & issue refund. They are saying that they cant issue refund. They have clearly mentioned there that the issue is from their end. Can someone help me to file a case against jio in consumer court. I have attached the screenshots.