Airtel — poor customer management

Address:

Talbahat, 284126

Been a postpaid customer for 5yrs. Have been cheated while exiting from postpaid to prepaid. I am not been given bills or the payment reciepts.
Nor my request for porting to other operater is being send to 1900.
I have all the data and supporting documents to drag this people to court and i am going to do that for cheating and causing harassment.
Regards