No proper delivery

I had booked for a cylinder on 10/11/09 and my residence is just 0.5 km from the service provider's office. Its more than 15 days and I have not yet received the cylinder. Till date I made more than 50 phone calls to the Rainbow Bharat gas agency (nearest service provider) and reminded them and also talked to the Manager. But there has be no use. They said they will send tomorrow, it never happens though..
Please look in to the issue.