I fell for the usual "Sales Department" scam: I requested for a Broadband connection recently, and one Mr. Kumar (phone number: 963 222 2289) promptly called up twice every day for a week and finally relieved me of Rs. 500.
After that, there was no trace of the gentleman, and everyone else I called - especially the managers at the call centers - had no clue whatsoever about what was happening.
The Vijayanagar sales office - Mr. Kumar, his manager, etc., has only one target: get customers to sign up with a deposit.
After that, it is no longer their job and any blame will be deflected to the "Engineering" department, which the customer does not have any access to.