Vodafone India — Port out request canceled every time

Address:

New Delhi, Delhi

Hii all
I have been trying to port out of vodafone for the last month
My mobile number [protected], they are not letting me do it. I have requested several time. I have even got the sim of the subscriber i want to switch to. But vodafone delhi cancels my port out request. I have paid the bills in advance. In fact paid more than the bill.
They are harassing me mentally and people from retention's are calling me after 1800 hrs and abusing me and using unethical language.
Please help.