Hello,
As you mentioned that you have already registered your complaint with the Airtel Broadband customer care but still not get any response, so we suggest you to send a written notice to the Nodal Officer via email or registered post, mention all the details in it and ask them for the proper solution with in the mentioned time in the notice, wait for their response and revert us back.
Note: Keep all the copy of Complaint, Notice and the registered post slip, this may help you if you need to knock the consumer forum.
Visit: Address to know the nodal officer details.
For notice reference Visit: Notice before filing consumer complaint


Hope this may solve your problem.
Still have a question feel free to contact us again.