Airtel — airtel postpaid number bill issue

Address:

Pune, Maharashtra, 411028

I am already port airtel no [protected] to vodafone that time i have total bill amount of airtel but today got call from customer department they told me your last two months bill pending. I didn't know why again bill if already paid.. This is harassment of customer.. I am using other services also of airtel. But airtel not provided good service... If your company continue these type of behaviour i am definitely close all services of airtel and going to use others. Airtel only advertising products but not giving good service like network, data packs, recharge, as well as harassment the customer. If my issue not solve immediately i will complaint against airtel.