Airtel — billing and network

Address: Thane, Maharashtra, 400615

I have raised complaint about airtel network on 6 october 2017 still my complaint in pending status, finally i have decided for portability airtel to other subscriber i paid extra amount (Rs. 450) to airtel. Airtel has rejected portability request because i have a due payment which has already paid in advance even i have got extra charge in my monthly bills like roaming and international calls which i never called. And they are not going to waived off.

I am totally frustrated with airtel service.
I want to raise my concern on higher level with trai or consumer court i want to sue this company please help in this matter

My airtel no. Is [protected]