Tata Docomo — don't cancel my port request

A couple of days ago i had raised a request to port my number from docomo to vodafone for various reasons. I received a call the next day from docomo customer care providing me with offers that will let me continue to keep using the docomo network. I accepted it and was promised that the number porting process will be canceled so i can continue to use the said network. Hence, i recharged for rs.499 assuming i will keep using docomo. To my dismay, i see this morning that my number has indeed been ported to vodafone and the request was not canceled after all. I am now a vodafone customer. I tried calling docomo customer care to explain the situation to receive my dues but the agent denied it being their fault. When i asked them to transfer my call to their senior executive, the agent put me on hold for a long time & finally disconnected my call. This is clearly the agent's fault who promised the porting process to be canceled. I am very disappointed with service