Airtel — wrong broadband plan

I bought a new airtel broadband connection. [protected]_kk is the id. I was promised and also given a pamphlet of 40mbps connection. I was charged inr 6018 including gst (Inr 5100 excluding gst) for 6 months for the 999 plan. The plan included 100gb per month at 40mbps and 750gb bonus data upfront. However, i have been given a 16mbps plan without any bonus data. Despite calling customer care on numerous occasions and also contacting the representative who came initially, the problem has not been resolved. It seems a clear case of cheating.