Airtel Broadband — bad behavior

i got the airtel broadband connection through Mr. Praveen Sharma. he told us that you take broadband combo pack, in which you providing 100 Mbps internet connection and land line.and he also told that you could disconnect your landline phone after one month and only use the broad band connection.
but after one month he never recieve our call and when i ask to the customer care for disconnect the land line phone, he told that there is no any such type of facility that without land line you use the broad band connection.
after this i called to Mr Praveen Sharma about this and told for disconnecting the land line, he did very miss behivor such abusing and told that DO WHAT I CAN.
i suffer this problem since 3 months of land line bill.