Airtel — wrong amount billed for broadband services

Address:

560092

When i got a new braodband connection from airtel in october 2017, i opted for 6+1 month plan according to which i had made payment for 6 month service in advance and the service was to be provided for 6+1 months (Total 7 months). But airtel authority updated my profile as monthly rental plan instead of the plan i opted for and has charged me rs. 2010 additionally as a due amount even though i have made my payments in advance. Because of this mistake, my outgoing services are now barred.
After 5 months long discussions and yelling i finally got to talk to the airtel finance team (Nishcitha, imraan khan, rajesh khanna) and they assured that the waiver off for rs.2010 will be processed and acknowledged the same in an email 10 days ago. The waiver off has not been processed yet and my outgoing services are still barred.