Airtel — wrong bill generated in airtel

Address:	122001
Website:	www.airtel.in

I have choose to port from airtel because for the past two weeks there is no network and i don't have receive any incoming calls in 4g network i raise a compain as well but there is no resolution for this from team airtel.
After this my current balance for airtel is 35 gb left when i port out and they have added 500 rs regarding airtel i can't understand the extra bill.
Please resolve the issue of the bill so i can pay the bill.
My contact no - [protected]