Airtel — Rude and careless service : not giving proper response for the issues

I have raised a complaint regarding internet issue on[protected] at airtel custormer care, they given due date of[protected], the customer executive said it will sorted out before[protected] but still it not solved. when i called the customer care executive after the due date they are saying it will take more time and will be sorted out by[protected]. They are cheating with us by providing bad network and because of this bad network i could not able perform my work since from 30 days.
They are cheating us by delaying unnecessarily
I request you to kindly help me in this issue and give the justice.
Thank You.