Airtel — UPC code not being generated

Since airtel is not able to provide data service to my location, I am trying to port my number to another cellular network service provider. When i am trying to generate porting code i am getting below message.
"upc cannot be generated as there are subsisting contractual obligations with your service provider"

After discussion with airtel helpdesk they just ask me to wait for some time. On visiting the airtel store, they also are not able to provide the solution. After waiting for so long still I am not able to generate upc code. I am still getting same issue.

Airtel service desk is unable to provide any solution.

Please help me will the issue and resolve it as soon as possible.

Mobile Number- [protected]