Trai — Not received the UPC code for Airtel mobile no. [protected] porting

I am using am airtel mobile no. [protected] on the name of Rohit sharma. Now i want to change the network provider from airtel to other one. I will sent the porting code request 30 times in last 20 days but porting code still not received. Airtel customer care also not provide any reason for the same.
So please help to resolve this issue on priority basis.